Assistance with child rearing genes is not an example of a direct benefit. The given option is about assistance with child rearing genes. It is not directly related to the individual, and it is not an essential component of life.
Direct benefits refer to the benefits that are received by an individual as a result of direct actions. These benefits are seen in the form of food, shelter, care, and other necessary components of life. Direct benefits are typically divided into two categories: Primary benefits and Secondary benefits.Primary benefits are the benefits that are directly related to the individual, such as food, shelter, and care. Secondary benefits are benefits that are indirectly related to the individual, such as employment, education, and medical care.Direct benefits are immediate and tangible. These benefits are measurable and quantifiable. The benefits of direct action can be measured in monetary terms. Indirect benefits are long-term and less tangible. These benefits are difficult to measure.Indirect benefits are related to the individual, such as increased earning potential, but not directly. The benefits of indirect action cannot be easily measured in monetary terms. They are long-term and less tangible.
Assistance with child rearing genes is not an example of a direct benefit. The given option is about assistance with child rearing genes. It is not directly related to the individual, and it is not an essential component of life.
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Describe the process of fertilization.
a. Indicate the two cells involved.
b Indicate the resulting cell that is produced at
fertilization.
c. Indicate the location in which this process takes place.
Fertilization is the process by which a sperm cell and an egg cell combine to form a new individual. It is a crucial step in sexual reproduction.
a. The two cells involved in fertilization are the sperm cell and the egg cell (also known as the ovum). The sperm cell is produced in the male reproductive system, specifically in the testes, while the egg cell is produced in the female reproductive system, specifically in the ovaries.
b. The resulting cell produced at fertilization is called the zygote. The zygote is formed when the sperm cell fuses with the egg cell during fertilization. This fusion combines the genetic material from both parents, resulting in a single cell with a complete set of chromosomes.
c. Fertilization typically takes place in the fallopian tubes of the female reproductive system. After ovulation, the released egg cell travels through the fallopian tube. If a sperm cell successfully reaches and penetrates the egg cell in the fallopian tube, fertilization occurs. The fertilized egg, or zygote, then continues its journey towards the uterus, where it implants itself in the uterine lining and develops further during pregnancy.
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Autosomal Recessive Trait. For this example, we’ll use albinism as our trait. Albinism results from the homozygous occurrence of the autosomal recessive allele a (genotype aa), which prevents the body from making enough (or any) melanin. For this example, use A for the normal pigmentation allele, and a for the albinism allele.
a) Consider two phenotypically non-albino parents, who have some children with albinism. What would be the possible genotypes of both the parents and the offspring? (Use a Punnett square to show your work.)
b) What genotypes would we expect from a family consisting of a non-albino man and a woman with albinism who have two children with albinism and two non-albino children? Provide genotypes for all six family members. You may find it useful to draw a Punnett square.
c) What genotypes would we expect for a family consisting of two parents with albinism who have only children with albinism? Again, provide the genotypes for both parents and children.
a. The Punnett square shows that there are four possible genotypes for the offspring: AA, Aa, Aa, and aa.
b. The genotypes for the family members are as follows:
Non-albino man: Aa
Woman with albinism: aa
Child 1 (albino): aa
Child 2 (albino): aa
Child 3 (non-albino): Aa
Child 4 (non-albino): Aa
c. The expected genotype of all their children will be aa.
What are the possible genotypes?a) If two phenotypically non-albino parents have children with albinism, it means that both parents must be carriers of the albinism allele (Aa) because albinism is an autosomal recessive trait.
Let's use the genotypes A and a to represent the normal pigmentation allele and the albinism allele, respectively.
Possible genotypes of the parents:
Parent 1: Aa
Parent 2: Aa
A a
A AA Aa
a Aa aa
The genotypes AA and Aa represent individuals with normal pigmentation, while the genotype aa represents individuals with albinism.
b) If a non-albino man (genotype Aa) and a woman with albinism (genotype aa) have two children with albinism and two non-albino children, let's create a Punnett square to determine the genotypes:
A a
a Aa aa
a Aa aa
The Punnett square shows the following genotypes for the family members:
Non-albino man: Aa
Woman with albinism: aa
Child 1 (albino): aa
Child 2 (albino): aa
Child 3 (non-albino): Aa
Child 4 (non-albino): Aa
c) If both parents have albinism (genotype aa) and they have only children with albinism, the Punnett square would look like this:
a a
a aa aa
a aa aa
In this case, both parents have the genotype aa, and all their children will also have the genotype aa, resulting in albinism in all offspring.
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describe the relationship in chemical and physical the sturcture of L-Dopa and the decarboxylase? how do they interact with eachother?
L-Dopa, a chemical compound, interacts with the enzyme decarboxylase, which removes a carboxyl group from L-Dopa, converting it into dopamine. This interaction is significant for increasing dopamine levels in the brain and is essential in the treatment of Parkinson's disease.
L-Dopa, also known as Levodopa, is a chemical compound that serves as a precursor for the neurotransmitter dopamine. It is used as a medication for treating Parkinson's disease. L-Dopa has a specific chemical structure that allows it to cross the blood-brain barrier, where it is converted into dopamine by the enzyme decarboxylase.
Decarboxylase is an enzyme that catalyzes the removal of a carboxyl group from a molecule. In the case of L-Dopa, decarboxylase removes the carboxyl group, converting it into dopamine. This interaction between L-Dopa and decarboxylase is crucial for increasing dopamine levels in the brain, as dopamine deficiency is a characteristic feature of Parkinson's disease.
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35 A section of the coding strand of the DNA sequence of a gene that is expressed in a healthy human liver cell is 5'-ATGCGCCGTAT-3'. A microRNA (miRNA) regulates this gene by signaling an enzyme to c
The mRNA molecule transcribed from this gene. The complementary sequence of the coding strand provided is 3'-TACGCGGCATA-5'.
Based on this information, the microRNA (miRNA) would bind to the mRNA molecule through base pairing interactions. miRNAs are small non-coding RNA molecules that play a crucial role in post-transcriptional gene regulation. They typically bind to the 3' untranslated region (UTR) of target mRNA molecules, leading to gene silencing or degradation of the mRNA. In this case, the miRNA would recognize and bind to the complementary sequence on the mRNA molecule. The binding occurs through base pairing interactions between the miRNA and the mRNA, where complementary nucleotides pair up. This binding can interfere with the translation of the mRNA into protein or lead to the degradation of the mRNA molecule. The specific binding of the miRNA to the mRNA sequence would signal the enzyme responsible for mRNA degradation or repression, ultimately regulating the expression of the gene in the liver cell. This regulation can control the amount of protein produced from the gene, influencing various cellular processes and functions in the liver cell.
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6. Complete the description of the drawing - give the names of neuron elements marked with the numbers 1-7 (USE THE TERMS: AXON, UNMYLLYNATED FIBER, MYELINATED FIBER, SCHWANN SHETAH, MYELIN SHEATH). 1
To accurately complete the description of the drawing and provide the names of the neuron elements marked with the numbers 1-7, we need additional information about the specific features or structures depicted in the drawing.
Axon: The axon is a long, slender projection of a neuron that carries electrical impulses away from the cell body towards other neurons or target cells.
Unmyelinated Fiber: Unmyelinated fibers are axons that lack a myelin sheath. They are typically smaller in diameter and transmit electrical impulses at a slower speed compared to myelinated fibers.
Myelinated Fiber: Myelinated fibers are axons that are covered by a myelin sheath, which is formed by specialized cells called Schwann cells. The myelin sheath acts as an insulating layer and allows for faster transmission of electrical impulses along the axon.
Schwann Sheath: The Schwann sheath, or Schwann cell, is a specialized cell in the peripheral nervous system (PNS) that wraps around and forms the myelin sheath around peripheral axons.
Myelin Sheath: The myelin sheath is a fatty, insulating layer that surrounds certain axons in the nervous system. It is formed by the repetitive wrapping of the plasma membrane of Schwann cells or oligodendrocytes around the axon.
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You engineered a new gene which includes GFP fused to a cytosolio protein. You then added a non-specific promoter and incorporate this new gene into the genome of a mouse. When you examine cells from these mice in the fluorescent microscope: O a. You will see the fluorescence throughout the cytoplasm of all the cells of the mouse. Ob. You will see the fluorescence throughout the cytoplasm of all cardiac cells in the mouse. Oc. You will see the fluorescence from the protein in the membrane of all cardiac cells in the mouse. Od. You will see the fluorescence in the membranes of all the cells of the mouse. Oe. None of the above will be seen.
You engineered a new gene which includes GFP fused to a cytosolic protein. You then added a non-specific promoter and incorporate this new gene into the genome of a mouse.
Option A is correct
When you examine cells from these mice in the fluorescent microscope: O a. You will see the fluorescence throughout the cytoplasm of all the cells of the mouse. Ob. You will see the fluorescence throughout the cytoplasm of all cardiac cells in the mouse. Oc. You will see the fluorescence from the protein in the membrane of all cardiac cells in the mouse. Od. You will see the fluorescence in the membranes of all the cells of the mouse. Oe. None of the above will be seen.When a new gene is engineered that includes GFP (green fluorescent protein) fused to a cytosolic protein and a non-specific promoter is added, and then the new gene is incorporated into the genome of a mouse, the fluorescence in the cells from these mice in the fluorescent microscope will be visible. The question is, where will the fluorescence be seen?Option A: You will see the fluorescence throughout the cytoplasm of all the cells of the mouse.This answer choice is incorrect.
The fluorescence will not be visible throughout the cytoplasm of all the cells of the mouse. Option B: You will see the fluorescence throughout the cytoplasm of all cardiac cells in the mouse. This answer choice is incorrect. The fluorescence will be seen in some parts of the mouse cells. Thus, the correct answer is none of the answer choices presented. Instead, the correct answer is that the fluorescence will be visible in the cytoplasm and not in any specific region.
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please help .. thank you
Topic 5: Homeostatic regulation of body systems occurs at three levels - local, neural, and hormonal. Often, similar end results are achieved by actions occurring at each of the three levels. What are
Homeostatic regulation of body systems occurs through local, neural, and hormonal levels. These levels work together to achieve similar end results by maintaining stability at the cellular level, coordinating rapid responses through the nervous system, and releasing hormones to regulate various bodily functions.
Homeostatic regulation of body systems occurs at three levels: local, neural, and hormonal. Each level plays a crucial role in maintaining stability within the body.
At the local level, cells and tissues have intrinsic mechanisms to regulate their immediate environment.
For example, if a tissue becomes acidic, local cells may release chemical signals to increase blood flow, deliver more oxygen, and remove waste products. This ensures a stable environment for cellular function.
The neural level involves the nervous system, which coordinates rapid responses to maintain homeostasis. Sensory receptors detect changes in the body and send signals to the brain or spinal cord.
The nervous system then initiates appropriate responses, such as shivering when body temperature drops or increasing heart rate during physical exertion.
The hormonal level involves the endocrine system, which releases hormones into the bloodstream to regulate various body functions.
Hormones act as chemical messengers, traveling through the blood to target tissues or organs. For instance, the hormone insulin regulates blood sugar levels by promoting glucose uptake by cells.
Although the actions at each level differ, they often achieve similar end results.
For example, if blood glucose levels rise, local cells may take up glucose, neural signals may stimulate the release of insulin, and hormonal actions may enhance glucose uptake by tissues.
This redundancy ensures robust homeostatic control and enables the body to respond effectively to internal and external changes.
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Complete question:
How does homeostatic regulation of body systems occur at three levels (local, neural, and hormonal), and how do these levels collectively achieve similar end results in maintaining stability within the body?
Question 10 Which alternative correctly orders the steps of the scientific method? O a) making observation - asking question - formulating hypothesis-testing hypothesis in experiment - analyzing results Ob) asking question-making observation - testing hypothesis in experiment-formulating hypothesis - analyzing results c) formulating hypothesis-testing hypothesis in experiment - asking question-making observation - analyzing results d) formulating hypotheses-testing hypothesis in experiment - analyzing results - asking question-making observation Moving to the next question prevents changes to this answer Question 8 of Question 8 0.75 points Save Ar "In 1877, a strange disease attacked the people of the Dutch East Indies. Symptoms of the disease included weakness, loss of appetite and heart failure, which often led to the death of the patient Scientists though the disease might be caused by bacteria. They injected chickens with bacteria isolated from the blood of sick patients. A second group was not injected with bacteria-It was the control group. The two groups were kept separate but under exactly the same conditions. After a few days, both groups had developed the strange disease-Based on the information given here, was the hypothesis supported or rejected? Oa) the data led to supporting the hypothesis bi the data led to relecting the himothori Question 6 What is a variable in a scientific experiment? a) a part of an experiment that does not change Ob) a part of an experiment that changes Question 2 Why is it important to have a control group in an experiment? a) control groups are important to allow for predicting the outcomes of an experiment b) control groups are important to prevent variables from changing during the experiment c) control groups are important to control the outcomes of the experiment d) control groups are important to establish a basis for comparison Why is it important to have a control group in an experiment? a) control groups are important to allow for predicting the outcomes of an experiment Ob) control groups are important to prevent variables from changing during the experiment Oc) control groups are important to control the outcomes of the experiment Od) control groups are important to establish a basis for comparison Dependent variables are: Oa) the part of the experiment that doesn't change Ob) the ones that cause other variables to change c) the ones that respond to other variables in the experiment d) the ones that can stand alone Imagine the following situation: a scientist formulates three different hypotheses for the same question. What should the scientist do next? Oa) test the three hypotheses at the same time in one experiment Ob) test two hypotheses at the same time in one experiment and then perform a second experiment to test the third hypothesis Oc) test each hypothesis separately, one at a time in three different experiments d) nothing, a question that leads to 3 different hypothesis cannot be answered
The correct alternative that orders the steps of the scientific method is: formulating hypotheses-testing hypothesis in experiment-analyzing results-asking question-making observation.The scientific method is a logical, empirical, and systematic method used to determine the accuracy of the observations and theories. Here are the steps involved in the scientific method:Making observations and asking questions Formulating hypotheses Designing experiments to test hypotheses Collecting data Analyze results Communicate results.
The hypothesis is a tentative answer to a question or problem. It is a statement that can be tested. Based on the given information in Question 8, the hypothesis was supported since the chickens in both the control and experimental groups developed the strange disease. Hence, the answer is (a) the data led to supporting the hypothesis.A variable in a scientific experiment is a part of an experiment that changes. It is an element or factor that can change or be changed during the experiment.Control groups are important to establish a basis for comparison. They are used to compare the effects of an independent variable on a dependent variable. Having a control group allows researchers to compare the effects of the independent variable in an experiment on the dependent variable to the other groups in the experiment.
Dependent variables are the ones that respond to other variables in the experiment. They are called dependent variables because they depend on the independent variable to cause a change. The independent variable is the one that causes a change in the dependent variable. For example, in an experiment, the dependent variable could be the amount of sugar consumed by a person each day, while the independent variable is the type of beverage consumed.A scientist should test each hypothesis separately, one at a time in three different experiments, if they have formulated three different hypotheses. Testing all three hypotheses simultaneously may lead to inconclusive or inaccurate results.
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Describe three different mechanisms that plankton may use to help them reduce settling velocity!
Plankton organisms employ various mechanisms to reduce their settling velocity, including size and shape adaptations, buoyancy regulation, and appendages or structures that increase drag.
Plankton organisms, being microscopic or small in size, have evolved different strategies to enhance their buoyancy and reduce their settling velocity in order to remain suspended in the water column. One mechanism is size and shape adaptations. Plankton may have elongated or flattened shapes that increase their surface area relative to their volume, reducing their sinking rate. They may also have spines or projections that create turbulence, increasing drag and slowing down their descent.
Another mechanism is buoyancy regulation. Some plankton possess gas-filled structures or lipid droplets that provide buoyancy. These structures, such as gas vacuoles or lipid sacs, help counteract the force of gravity and keep the organisms suspended in the water column.
Additionally, plankton can have appendages or structures that increase drag and hinder settling. For example, some diatoms have intricate and delicate silica frustules or shells that increase their surface area and create drag, slowing down their descent. Appendages like bristles, setae, or spines can also help increase drag and reduce settling velocity.
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5.
Not all the IgG antibodies currently in your system are the same.
How do they differ from one another and why is it important that
they are different?
The variability of IgG antibodies allows the immune system to respond to a wide range of antigens, effectively neutralize pathogens, establish immune memory, and provide protection against various diseases.
IgG antibodies, also known as immunoglobulin G antibodies, are a type of antibody found in the immune system. While they are all part of the IgG class, they can differ from one another in terms of their specificity and binding capabilities. These differences arise due to the diverse nature of antigens they encounter and respond to.
The variability of IgG antibodies is important for several reasons:
Specificity: IgG antibodies can recognize and bind to specific antigens, which are foreign substances such as bacteria, viruses, or other pathogens. The diverse repertoire of IgG antibodies allows for the recognition of a wide range of antigens, helping to target and eliminate different types of pathogens.
Defense against different pathogens: Different pathogens have unique antigens on their surface. The diversity of IgG antibodies ensures that the immune system can respond effectively to a wide variety of pathogens by producing antibodies that specifically recognize and neutralize those particular antigens.
Immune memory: After an initial exposure to a pathogen, the immune system "remembers" the antigen and produces specific IgG antibodies against it. These memory antibodies enable a quicker and more efficient immune response upon subsequent encounters with the same pathogen. The diversity of IgG antibodies helps maintain a broad memory repertoire, ensuring protection against a range of pathogens over time.
Protection during vaccination: Vaccinations stimulate the immune system to produce specific IgG antibodies against targeted antigens found in weakened or inactivated forms of pathogens. The diversity of IgG antibodies allows for a robust immune response and the development of immunological memory, providing long-term protection against future infections.
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atmosphere had very low oxygen levels, but a to accumulate in the shallow oceans as around 2.4 billion so much that the oxygen was accumulating in the atmosphere peroxides, singlet oxygen, and hydroxyl radicals. Organisms living in thi new oxygen-rich environm Unfortunately, pure oxygen can be converted into reactive oxygen spece (ROS) including superoxide, catalase, to break down ROS. Humans actually have three forms of SOD as las catalase, which is found i the Oxygen Revolution needed to evolve to produce some enzymes, such as superoxide dismutase (500) within the cell as well as damage to DNA and RNA. Bacteria that stayed on and or in shallow oceans during needed mechanisms to convert ROS to a less reactive form in order to prevenciarge-scale oxidation dama peroxisomes. Organisms that didn't already have a mechanism in place to handle the ROS, were either forced a respiration was now possible and highly efficient mitochondria evolved, which allowed early eukaryotes response, the organisms that were able to handle the ROS underwent great diversification. Aer anaerobic refuges or died out in the large extinction event caused by the new oxygen-rich environment. methods organisms become much more complex. Due to the variable environments that existed at different times in Earth's history, highly variable r for ATP regeneration exist - most of which are found in bacteria. Most bacteria and most of the you think of carry out aerobic respiration. As you can see, throughout history, photosynthesis and cellular respiration have been linked. Today, we'll be O, increases as a result of photosynthesis, during respiration the opposite is true: as the plant breaks down exploring that link further by analyzing CO₂ and O; concentrations in spinach leaves. While CO₂ decreases and and photosynthesis by measuring the 0₂ glucose to release stored energy, CO, is released into the surrounding water or atmosphere, i concentrations decrease. Thus, we can estimate rates of respiration or consumption or production of these two gases. Questions (Chapters 9 and 10) to answer the following questions: 1. Oxygen is produced from water in the light reactions in a process called photolysis. What else happens du photolysis? Can the light reactions of photosynthesis continue if water is not available? Explain. 2. Describe the role of oxygen in cellular respiration:
The Oxygen Revolution, which occurred around 2.4 billion years ago, led to the accumulation of oxygen in the Earth's atmosphere. This increase in atmospheric oxygen levels had significant impacts on the evolution of organisms and the development of various mechanisms to handle reactive oxygen species (ROS). Organisms that were able to adapt and produce enzymes like superoxide dismutase and catalase, capable of neutralizing ROS, underwent diversification. However, organisms lacking such mechanisms faced oxidative damage and, in some cases, extinction. The evolution of efficient mitochondria enabled eukaryotes to take advantage of aerobic respiration, leading to their proliferation. The link between photosynthesis and cellular respiration can be observed today through the exchange of CO₂ and O₂ during these processes, allowing us to estimate rates of respiration and photosynthesis.
Around 2.4 billion years ago, the Earth experienced the Oxygen Revolution, during which atmospheric oxygen levels increased significantly. This rise in oxygen resulted from the accumulation of oxygen in the atmosphere due to the activity of early photosynthetic organisms. However, this oxygen posed a challenge for organisms as it could lead to the production of reactive oxygen species (ROS) that could cause cellular damage.
To cope with the presence of ROS, organisms needed to evolve mechanisms to handle and neutralize these reactive molecules. One crucial enzyme involved in this process is superoxide dismutase (SOD), which converts superoxide radicals into less harmful hydrogen peroxide. Humans possess three forms of SOD. Another enzyme, catalase, helps break down hydrogen peroxide into water and oxygen.
The ability to handle ROS became essential for survival in an oxygen-rich environment. Organisms that already had mechanisms in place to neutralize ROS were able to adapt and diversify. On the other hand, organisms lacking these mechanisms were susceptible to oxidative damage and faced challenges in their survival and reproduction.
Aerobic respiration, which is highly efficient in energy production, evolved in response to the increased availability of oxygen. Efficient mitochondria played a vital role in aerobic respiration, enabling early eukaryotes to thrive in oxygen-rich environments and undergo further diversification.
Today, the link between photosynthesis and cellular respiration can be observed by analyzing the exchange of CO₂ and O₂. During photosynthesis, plants take in CO₂ and release O₂, while during respiration, the opposite occurs as glucose is broken down to release energy, resulting in the release of CO₂ and the consumption of O₂. By measuring the concentrations of these gases, we can estimate the rates of respiration and photosynthesis in organisms.
Overall, the Oxygen Revolution and the subsequent evolution of mechanisms to handle ROS played a significant role in shaping the diversity and complexity of life on Earth.
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Photolysis is the process by which water molecules are split into hydrogen ions, electrons, and molecular oxygen during the light reactions of photosynthesis. Oxygen is essential in cellular respiration as it serves as the final electron acceptor in the electron transport chain.
Explanation:Oxygen is produced from water in the light reactions of photosynthesis through a process called photolysis. During photolysis, water molecules are split into hydrogen ions, electrons, and molecular oxygen. The light reactions of photosynthesis cannot continue without water, as water provides the source of electrons needed to replace those lost during the conversion of light energy to chemical energy.
Oxygen plays a crucial role in cellular respiration. During cellular respiration, glucose is broken down to release energy that is used to produce ATP. Oxygen acts as the final electron acceptor in the electron transport chain, accepting electrons from complex IV and combining with hydrogen ions to form water. Without oxygen, the electron transport chain cannot function, and ATP production is severely impaired.
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A cross between two true breeding lines produces F1 offspring that are heterozygous. When the F1 progeny are selfed a 1:2:1 ratio is observed. What allelic interaction is manifested with this result? Select the correct response(s): Overdominance Co Dominance None of the choices Complete Dominance Incomplete Dominance All of the choices
The observed 1:2:1 ratio in the F2 generation suggests an allelic interaction known as incomplete dominance.
Incomplete dominance occurs when the heterozygous condition (F1 generation) exhibits an intermediate phenotype between the two homozygous parental lines. In this case, neither allele is completely dominant over the other, resulting in a blend or mixture of the traits in the F1 offspring.
During selfing of the F1 generation, the possible genotypes and phenotypes of the F2 offspring are as follows: 1/4 will be homozygous for one allele and display the phenotype of one parent, 1/4 will be homozygous for the other allele and display the phenotype of the other parent, and 1/2 will be heterozygous and exhibit an intermediate phenotype between the two parents.
This pattern of inheritance, where the heterozygotes show an intermediate phenotype, is characteristic of incomplete dominance. It is important to note that incomplete dominance is different from complete dominance, where one allele completely masks the expression of the other, and also differs from co-dominance, where both alleles are fully expressed in the heterozygous condition.
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Question 11 2 pts Statetment: It does not matter which DNA polymerase is used when running the PCR. Is the above statement accurate? Defend your answer. Edit View Insert Format Tools Table 12pt Paragraph BIU AV 2²: I 0 words > 2 P
The given statement: "It does not matter which DNA polymerase is used when running the PCR" is not accurate. PCR (Polymerase Chain Reaction) is an important technique used to amplify small fragments of DNA into large amounts that are enough to be analyzed. Thus, it is not accurate to say that it does not matter which DNA polymerase is used when running the PCR.
A polymerase enzyme is used in PCR to amplify the target DNA. There are different types of polymerase enzymes that can be used in PCR. The choice of polymerase enzyme used in PCR is critical as it affects the sensitivity, specificity, accuracy, and yield of the PCR.The Taq polymerase is the first and most widely used polymerase enzyme in PCR. It is derived from the bacterium Thermus aquaticus, which lives in hot springs and geysers, and is ideal for use in PCR as it is stable at high temperatures. The Taq polymerase is used in PCR to amplify DNA fragments from different sources, including human, animal, and plant DNA.
However, the Taq polymerase has a major drawback; it lacks 3’-5’ exonuclease proofreading activity, which can lead to errors in the amplified DNA fragments.There are other types of polymerase enzymes, such as Pfu, Phusion, and Platinum, which are more accurate and have proofreading activity. These polymerase enzymes are used in PCR to amplify DNA fragments that are critical for downstream applications such as cloning, sequencing, and mutagenesis. Hence, the choice of polymerase enzyme used in PCR is critical and should be based on the specific application of the amplified DNA fragment. Thus, it is not accurate to say that it does not matter which DNA polymerase is used when running the PCR.
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I have a mantle that protects my internal organs, and a calcareous shel for protection. I accomplish locomotion using my foot, and scrape algae off of rocks using my radula. To what animal phylum do I belong? a. Arthropoda b. Platyhelminthes c. Porifera d. Cnidaria e. Mollusca f. Echinodermata
The animal phylum that includes animals with a mantle that protects their internal organs, a calcareous shell for protection, foot locomotion, and a radula for scraping algae off rocks is Mollusca. Therefore option (E) is the correct answer.
Mollusca is a phylum of invertebrate animals that includes snails, slugs, mussels, octopuses, and squids. This phylum is the second-largest animal phylum, with over 100,000 known species. They have a diverse range of forms, including snails, octopuses, squids, and mussels. Molluscs are present in a variety of environments, including saltwater, freshwater, and terrestrial environments.
They have a radula, a rasping tongue-like structure that aids in the consumption of food. The foot of a mollusk is used for movement, while the mantle is used to protect the internal organs and produce a shell. In conclusion, the animal phylum that includes animals with a mantle that protects their internal organs, a calcareous shell for protection, foot locomotion, and a radula for scraping algae off rocks is Mollusca. Option (E) is the correct answer.
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Crossing true-breeding pea plants with yellow peas with true-breeding plants with green peas yielded an F1 generation with 100% offspring plants with yellow peas. The F1 plants are self- fertilized and produce F2 In a randomly selected set of 100 peas from F2 you notice the following phenotypic numbers: 64 yellow and 36 green. Using the Hardy-Weinberg principle What is the observed frequency of the recessive allele in this F2 population? Select the right answer and show your work on your scratch paper for full credit. a. 0.40 b. 0.64
c. 0.36
d. 0.60
True-breeding pea plants with yellow peas with true-breeding plants with green peas yielded an F1 generation with 100% offspring plants with yellow peas. the correct answer is d. 0.60.
To determine the observed frequency of the recessive allele in the F2 population using the Hardy-Weinberg principle, we need to consider the phenotypic ratios and use the equation:
p^2 + 2pq + q^2 = 1
where p is the frequency of the dominant allele, q is the frequency of the recessive allele, p^2 represents the frequency of homozygous dominant individuals, q^2 represents the frequency of homozygous recessive individuals, and 2pq represents the frequency of heterozygous individuals.
Given:
In the F2 generation, we observed 64 yellow peas (which are homozygous dominant or heterozygous) and 36 green peas (which are homozygous recessive).
From the given phenotypic ratios, we can deduce that the frequency of homozygous recessive individuals (q^2) is 36/100 = 0.36.
Using the Hardy-Weinberg equation, we can solve for q:
q^2 = 0.36
q = √0.36
q ≈ 0.6
The observed frequency of the recessive allele (q) in this F2 population is approximately 0.6. Therefore, the correct answer is d. 0.60.
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Which of the following chordate characteristics is incorrectly matched? a) dorsal hollow nerve cord-spinal nerve cord. b) pharyngeal slits-mouth. c) notochord-spine. d) Cendostyle-thyroid.
The incorrectly matched chordate characteristic is:
d) Cendostyle-thyroid.
What are chordates?Chordates are a diverse group of animals that belong to the phylum Chordata. Chordates have a notochord at a stage of their lives.
Considering the above:
The correct term that should be matched with the thyroid is "endostyle."
The endostyle is a glandular groove found in the pharynx of some chordates, such as invertebrate chordates and early embryonic stages of vertebrates. It produces mucus and plays a role in filter feeding and thyroid hormone production in vertebrates.
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Eventually, you are able to grow the chemolithoautotroph as well. Given what you know about the organism’s metabolism and the environment it came from, what should you change about the standard culturing conditions to promote the growth of this organism?
A) Lower the pH
B) Add more anaerobic electron acceptors
C) Expose the cells to sunlight
D) Add glucose
E) Grow the cells anaerobically
The metabolic pathway of chemolithoautotrophs is unique in the fact that these bacteria are able to survive without light, organic compounds, or oxygen as they gain their energy through the oxidation of inorganic compounds like nitrate, ammonia, and sulfur.
In order to promote the growth of chemolithoautotrophs, a few modifications can be made to the standard culturing conditions. The options are provided below:
1) Lower the pH: This condition won't be helpful in promoting the growth of the chemolithoautotrophs as most of the chemolithoautotrophs are found to grow at a neutral or an alkaline pH.
2) Add more anaerobic electron acceptors: This condition could be useful in promoting the growth of chemolithoautotrophs as most of these organisms require electron acceptors like CO2, NO2-, SO4-2, Fe2+, etc for their metabolism.
3) Expose the cells to sunlight: As chemolithoautotrophs are known to survive without light, this condition is not applicable.
4) Add glucose: This condition is not applicable as chemolithoautotrophs do not rely on organic compounds for their metabolism.
5) Grow the cells anaerobically: This condition could be useful in promoting the growth of chemolithoautotrophs as most of these organisms are found to grow in anaerobic conditions.
Therefore, growing the cells anaerobically could help in promoting the growth of the chemolithoautotroph.
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Explain the roles of key regulatory agencies within the United
States in the safe release of bioengineered organisms in the
environment and in regulating food and food additives produced
using biotech
The key regulatory agencies in the United States for the safe release of bioengineered organisms and regulation of biotech food and additives are the EPA, USDA, and FDA.
The key regulatory agencies within the United States that play important roles in the safe release of bioengineered organisms in the environment and in regulating food and food additives produced using biotech include the U.S. Environmental Protection Agency (EPA), the U.S. Department of Agriculture (USDA), and the Food and Drug Administration (FDA).
The U.S. Environmental Protection Agency (EPA) is responsible for regulating bioengineered organisms that are intended to be released into the environment. The EPA evaluates the potential risks associated with these organisms and assesses their potential impact on ecosystems and human health. They ensure that appropriate measures are in place to minimize any potential adverse effects and to protect the environment.
The U.S. Department of Agriculture (USDA) plays a role in regulating bioengineered crops and organisms. The USDA's Animal and Plant Health Inspection Service (APHIS) is responsible for assessing the potential risks and impacts of genetically modified crops and organisms on agriculture and the environment. They oversee the permitting process for field trials and commercialization of genetically modified crops.
The Food and Drug Administration (FDA) is responsible for regulating food and food additives produced using biotechnology. The FDA ensures that these products are safe for consumption and accurately labeled. They evaluate the safety and nutritional profile of genetically modified crops, as well as the safety of food additives derived from biotech processes.
These regulatory agencies work together to establish and enforce regulations and guidelines to ensure the safe release of bioengineered organisms and the regulation of biotech-derived food and food additives in the United States. Their collective efforts aim to protect the environment, safeguard public health, and provide consumers with accurate information about the products they consume.
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_____is the region at which sister chromats are bound together
The region at which sister chromatids are bound together is called the centromere.
The centromere is a specialized DNA sequence located on each sister chromatid. It serves as a crucial attachment point during cell division, ensuring the proper separation of sister chromatids into daughter cells. The centromere plays a vital role in the formation of the kinetochore, a protein structure that interacts with the spindle fibers during mitosis and meiosis. The centromere contains repetitive DNA sequences, such as the alpha satellite DNA in humans, which contribute to its structure and function. The binding of proteins to the centromere, including specific histones and kinetochore proteins, helps maintain the integrity of the sister chromatids and ensures their accurate distribution during cell division.
The centromere plays a crucial role in maintaining genetic stability and fidelity by facilitating the faithful segregation of chromosomes during cell division, ultimately leading to the formation of genetically identical daughter cells.
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1. Please describe the journal of how starch becomes ATP molecules in a skeletal muscle cells. Describe the chemical, physical, and biological events occurs in the gastrointestinal, circulatory systems (3 points), and the molecular evens in the skeletal muscle cells (2 points). 2. Kidney function indicators: What is the source of albumin and hemoglobin in urine? (1 point) Explain based on the urine formation mechanisms why we have nearly no albumin and hemoglobin in healthy urine? (2 points) Why leukocyte is not considered as a kidney function indicator? (2 points) How does leukocyte get into the urine from bloodstream? (1 points)
1. Starch is broken down into glucose in the gastrointestinal system. Glucose is absorbed into the bloodstream and delivered to skeletal muscle cells. In the cells, glucose undergoes glycolysis to produce ATP through a series of chemical reactions.
ATP is then used for muscle contraction. This process involves both physical digestion in the gastrointestinal system and biological events in the circulatory system and skeletal muscle cells.
In the gastrointestinal system:
- Starch is hydrolyzed into glucose by enzymes like amylase.
- Glucose is absorbed into the bloodstream through the intestinal wall.
In the circulatory system:
- Glucose is transported in the bloodstream to the skeletal muscle cells.
In skeletal muscle cells:
- Glucose enters the cells through glucose transporters.
- Glycolysis occurs, breaking down glucose into pyruvate.
- Pyruvate is further converted into ATP through cellular respiration.
2. The source of albumin in urine is damaged kidney filtration membranes, and hemoglobin can appear in urine due to various medical conditions. Healthy urine has minimal albumin and hemoglobin because the kidneys efficiently filter and reabsorb these substances, preventing their excretion. Leukocytes are not considered kidney function indicators because their presence in urine is usually associated with urinary tract infections or other pathological conditions. Leukocytes can enter the urine from the bloodstream by crossing the damaged or inflamed kidney filtration membranes.
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epidemiology
Short answer questions Question 5 A case series is an example of what kind of study design? O All of the answers listed here are correct. O Analytical Observational O Experimental Descriptive Observat
A case series can be classified as either an analytical observational, experimental study, or descriptive observational study design. Hence option 2, 3, and 4 are correct.
A case series is a type of study design that involves the collection and analysis of data from a group of individuals who share a common characteristic or condition. It is typically used to describe the characteristics, outcomes, and patterns of a specific group of cases, such as patients with a particular disease or those exposed to a certain treatment.
In terms of study design classification, a case series can fall into different categories depending on the nature of the study. It can be considered an analytical observational study design if the data is analyzed to identify associations or relationships between variables.
It can also be an experimental study design if interventions or treatments are applied to the cases. Additionally, a case series can be classified as a descriptive observational study design if it focuses on describing the cases without any interventions. Therefore, all of the answer choices provided are correct options for classifying a case series study design.
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The complete question is:
A case series is an example of what kind of study design?
1. All of the answers listed here are correct.
2. Analytical Observational
3. Experimental study
4. Descriptive Observational
4. None of the answer listed here are correct
In the last step of secretion, proteins or ions made by a cell
are delivered to the cell membrane in a vesicle so that exocytosis
can deliver the contents to the extracellular space. True/false
Its True, In the last step of secretion, proteins or ions made by a cell are delivered to the cell membrane in a vesicle so that exocytosis can deliver the contents to the extracellular space.
Exocytosis is a type of active transport in which a cell transports molecules (such as proteins) out of the cell by secreting them through an energy-dependent process. It is a process in which a cell releases materials from its intracellular space to the extracellular space. The materials being secreted are typically large molecules such as proteins, lipids, and carbohydrates, and they are packaged into vesicles for transport to the cell surface.
The process of exocytosis is tightly regulated by a variety of intracellular signals that control the release of vesicles from the cell membrane. When a vesicle reaches the cell membrane, it fuses with the membrane and the contents of the vesicle are released into the extracellular space. The proteins or ions are then delivered to the cell membrane in a vesicle so that exocytosis can deliver the contents to the extracellular space.
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List the names of the genes which are not affected by Doxorubicin and justify your answer. [30%]
Some of the genes that are not affected by Doxorubicin are PTPRO, TFF3, DUSP1, and SLC7A5.
Some of the genes that are not affected by Doxorubicin and justify the answer are:
PTPRO: Protein tyrosine phosphatase receptor type O (PTPRO) is a tumour suppressor gene that is often downregulated in various cancer types. Doxorubicin has been shown to have no effect on PTPRO gene expression in breast cancer cells.
TFF3: Trefoil factor 3 (TFF3) is a gene that is involved in cell proliferation and differentiation. TFF3 is frequently overexpressed in many cancer types, including breast cancer. However, it has been reported that Doxorubicin does not affect TFF3 gene expression in breast cancer cells.
DUSP1: Dual-specificity phosphatase 1 (DUSP1) is a gene that encodes a protein involved in the regulation of cell growth and differentiation. Doxorubicin has been found to have no effect on DUSP1 gene expression in breast cancer cells.
SLC7A5: Solute carrier family 7 member 5 (SLC7A5) is a gene that encodes a protein involved in amino acid transport. This gene has been found to be unaffected by Doxorubicin in breast cancer cells
Doxorubicin is a widely used chemotherapy drug for the treatment of various cancers, including breast cancer. However, the drug has significant side effects and can affect the expression of many genes in cells. The identification of genes that are not affected by Doxorubicin is essential for understanding the drug's mechanism of action and identifying potential targets for combination therapies.
Some of the genes that are not affected by Doxorubicin and justify the answer are PTPRO, TFF3, DUSP1, and SLC7A5. PTPRO is a tumour suppressor gene that is often downregulated in various cancer types. However, Doxorubicin has been shown to have no effect on PTPRO gene expression in breast cancer cells. TFF3 is a gene that is involved in cell proliferation and differentiation and is frequently overexpressed in many cancer types. However, it has been reported that Doxorubicin does not affect TFF3 gene expression in breast cancer cells. DUSP1 is a gene that encodes a protein involved in the regulation of cell growth and differentiation.
Doxorubicin has been found to have no effect on DUSP1 gene expression in breast cancer cells. SLC7A5 is a gene that encodes a protein involved in amino acid transport and has been found to be unaffected by Doxorubicin in breast cancer cells.
Doxorubicin is a potent chemotherapy drug with significant side effects that can affect the expression of many genes in cells. The identification of genes that are not affected by Doxorubicin is essential for understanding the drug's mechanism of action and identifying potential targets for combination therapies. Some of the genes that are not affected by Doxorubicin are PTPRO, TFF3, DUSP1, and SLC7A5. These genes could serve as potential targets for combination therapies to improve the efficacy of Doxorubicin treatment.
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Alzheimer's disease can be sporadic and familial . what is the
difference ?
There are two basic types of Alzheimer's disease: sporadic and familial. The underlying causes and inheritance patterns are different.
The majority of cases of Alzheimer's disease are sporadic, which is the most prevalent type. There is no obvious family history or genetic predisposition associated with it. Although the precise origin of sporadic Alzheimer's is unknown, it is thought that a mix of genetic, environmental, and lifestyle factors may play a role.On the other hand, familial Alzheimer's disease is relatively uncommon and has a distinct hereditary component. Certain genes, including the amyloid precursor protein (APP), presenilin 1 (PSEN1), and presenilin 2 (PSEN2) genes, are mutated to cause it. As a result of the autosomal dominant pattern of inheritance for these mutations, an individual is
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Question 5: Graphically illustrate the expected thermoneutral zone (TNZ) of a Kudu (savannah regions of Africa) and that of a Reindeer (tundra regions of the Holarctic). Provide a reason for the difference in the TNZ of the two species. [10] Question 6: Briefly discuss the differences in osmoregulation between marine and freshwater bony fishes. You answer should also include figures that illustrate water and salt flux in each animal in their respective environments. [15]
To graphically illustrate the expected temperate zone in Kudu and Rena, it is necessary to create a graph with the temperature-humidity index for each species, and this index is the reason for the difference between the TNZ of each species.
Marine bony fish osmoregulate through osmoconformity, while freshwater fish osmoregulate through common osmoregulation.
How are the two osmoregulation processes different?Osmoconformity allows the body fluids of marine fish to have a saline concentration similar to seawater.Ordinary osmoregulation allows the body fluids of freshwater fish to have a higher salt concentration than the surrounding freshwater.Regarding the expected thermoneutral zone in Kudu and Rena, we can say that the main difference will be the temperature-humidity index for each species since the expected TNZ for Kudus in the savannah regions of Africa would probably have a temperature range higher with lower humidity levels, as these animals are more adapted to hot and dry climates.
The expected TNZ for Reindeer in the Holarctic tundra regions would likely have a lower temperature range with higher humidity levels, which makes reindeer adapted to very cold climates.
This would promote graphs where Cudo's TNZ would show a wider temperature range with relatively low humidity levels. On the other hand, the graph for Rena would show a narrower temperature range with relatively higher humidity levels.
Another reason that can be used to explain this difference is the body structure of the animals, as reindeer have strong fur that regulates their body temperature to survive low temperatures.
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Two Factor Cross Practice Problem You are a tomato breeder with an extensive collection of red tomato lines. You recently received seeds for a true-breeding line with delicious yellow tomatoes, but it is susceptible to tobamovirus. You want to produce a true-breeding tobamovirus-resistant yellow tomato line for your collection. You have a true-breeding red tomato line that is resistant to tobamovirus. You know that resistance is due to a dominant allele of the Tm-2 gene (or T-locus). You also know red coloration is due to a dominant allele at the R-locus, and yellow coloration is the recessive R-locus trait. 1. What are the genotypes of the true-breeding a) susceptible yellow tomato line and b) resistant red tomato line? These are your parental lines. 2. If you cross the two parental lines, what will the F, genotypes and phenotypes be? Is this the final tomato line you want? Why or why not? 3. If you cross F, with Fy, what will the phenotypic ratio be in the Fz population? What proportion of the F, will have the phenotype you desire? Of those that have the phenotype you desire, how many possible genotypes can they have? 4. Now working only with the Fplants that have your desired phenotype, what kind of plant will you cross them with to determine their genotype? We will call these test crosses. What will the results be in the testcross progeny for your desired F,? What will the results be in the testcross progeny for F, with the non-desirable genotype?
The genotypes of the true-breeding a) susceptible yellow tomato line are rr and tt and that of b) resistant red tomato line is RR and Tt.
On crossing two parental lines, the F1 genotypes will be Rr and Tt and phenotypes will be red and resistant to tobamo virus. No, this is not the final tomato line that is required. 3. If we cross F1 with Fy, the phenotypic ratio will be 9:3:3:1 in the F2 population. 1/16 or 6.25% of the F2 population will have the desired phenotype. Out of those who have the desired phenotype, 2 possible genotypes can be there.
The test cross plant for determining the genotype of F1 with the desired phenotype will be rr and tt genotype with yellow coloration and susceptible to tobamo virus. The results in the test cross progeny for the desired F1 would be all red and resistant to tobamo virus. The results in the test cross progeny for F1 with a non-desirable genotype would be 1:1:1:1.
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Match the four common fungal diseases and their causative agents. Histoplasma capsulatum [Choose ] Tinea species [Choose] Candida [ Choose] Aspergillus [Choose ]
Match the four common fungal diseases and their causative agents. Histoplasma capsulatum - Histoplasmosis, Tinea species - Dermatophytosis (ringworm), Candida - Candidiasis, Aspergillus - Aspergillosis.
Diseases are abnormal conditions or disorders that affect the normal functioning of the body, leading to physical or mental impairments. There are numerous types of diseases, including infectious diseases caused by pathogens like bacteria, viruses, or parasites (e.g., influenza, malaria); chronic diseases characterized by long-term persistence or recurring symptoms (e.g., diabetes, hypertension); genetic disorders caused by inherited genetic mutations (e.g., cystic fibrosis, sickle cell anemia); autoimmune diseases where the immune system attacks the body's own tissues (e.g., rheumatoid arthritis, lupus); and many others affecting various organs and systems in the body. Accurate diagnosis, treatment, and preventive measures are vital in managing diseases and promoting overall health.
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Suppose you want to understand how a model prokaryote regulates its internal pH as the external pH changes. Design an experimental protocol that will allow you to understand the mechanisms involved in such processes. Try to answer, how will you induce the change in pH? what variables will you observe to define the mechanisms by which pH is regulated? what results do you expect to obtain? experimental controls?
To understand how a model prokaryote regulates its internal pH as the external pH changes, the following experimental protocol can be followed.
Inducing pH changeTo induce a change in pH, an acid or a base can be added to the medium in which the prokaryote is grown. By measuring the initial pH of the growth medium, the appropriate amount of acid or base can be added to change the pH to the desired level.
The pH of the medium should be measured periodically over time to ensure that the pH is maintained at the desired level throughout the experiment.Variables to observeTo understand the mechanisms involved in regulating pH, the following variables can be observed:Internal pH of the prokaryote - The internal pH can be measured using a pH-sensitive fluorescent dye.
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14. In Drosophila a cross was made between homozygous wild-type females and yellow-bodied males. All the F1 were phenotypically wild-type. In the F2 the following results were observed; 123 wild-type males, 116 yellow males, and 240 wild-type females. a. Is the yellow locus autosomal or sex-linked? b. Is the mutant gene for yellow body color recessive or dominant? Solution: a. sex-linked
b. recessive
The sex-linked locus means that the gene is located on the X or Y chromosome instead of the autosomes. This question is about Drosophila, in which a cross between homozygous wild-type females and yellow-bodied males was made.
In the F1, all were wild-type. In the F2, there were 123 wild-type males, 116 yellow males, and 240 wild-type females. The sex-linked locus is represented by the yellow-bodied males because they are recessive to the wild-type locus on the X chromosome. This makes the yellow locus sex-linked. 123 wild-type males and 240 wild-type females are phenotypically normal and homozygous dominant. 116 yellow males are hemizygous recessive because they have only one X chromosome.
Thus, the presence of the recessive mutant allele would cause the male to have a yellow body color because the Y chromosome doesn't have the wild-type allele to mask it.
In conclusion, the yellow locus is sex-linked, and the mutant gene for yellow body color is recessive.
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Which of the following is mismatched? a) albumin transport cholesterol. b) globulin- make antibodies. c) albumin - regulate osmotic balance. d) globulin - lipid transport. e) fibrinogen -blood clotting.
The mismatched option is globulin - make antibodies. So, option B is appropriate.
The correct association between globulin and its function is globulin - lipid transport. Globulins are a group of proteins found in the blood plasma and they have various functions, including lipid transport. Examples of globulins involved in lipid transport are low-density lipoproteins (LDLs) and high-density lipoproteins (HDLs) that transport cholesterol and other lipids in the bloodstream.
On the other hand, antibodies, which are proteins involved in the immune response, are produced by a specific type of globulin called immunoglobulins. They are not directly responsible for making antibodies.
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