Answer: Option B.
All humans have the same phenotypes but different genotypes.
Explanation:
Genetics is a branch of biology that involve the study of genes, heritable traits and variation in genes.
All humans have phenotypes and genotypes
The genotypes which is the characteristics or traits or genes an organism inherited from his parents. genotypes is different in humans because every one inherited different genes from their parents.
Phenotypes is observable characteristics seen or observed in a organisms due to the inherited characteristics from the parents and environmental interaction.
Phenotype is almost the same in humans, because it expressed inherited traits. We have same phenotype, which is expression of traits.
-Lab-
"Why are cells so small"
Answer:
Explanation:
Because we need a lot of cells and if they were big only a small about would fit.
Juan conducted an experiment and asked Catherine to replicate it. Juan’s values are 16, 15, 15, 16, and 15. Catherine’s values are 16, 14, 16, 15, and 15.
Answer:
i think inexact
Explanation:
Answer:
c
Explanation:
i took the exam i promise
Which of the following is NOT a product of the light reaction?
Answer:
all but the last one
Explanation:
NADH is not a product of the light reaction of photosynthesis.
• The role of NAD+ is that it acts as an electron carrier.
• NADH is formed from NAD when it oxidizes the compound by accepting electrons and adding hydrogen ions to the compound.
What do NADH mean?
NADH stands for "Nicotinamide Adenine Dinucleotide (NAD) + Hydrogen (H)." This chemical occurs naturally in the body and plays a role in the chemical process that produces energy.People use NADH supplements as medicine.Learn more about NADH here.
http://brainly.com/question/904448
#SPJ2
At the neuromuscular junction, _______ must enter the synaptic end bulb to stimulate the release of ____________, which binds to ligand gates so ________ can enter the muscle fiber.
Answer:
At the neuromuscular junction, calcium must enter the synaptic end bulb to stimulate the release of acetylcholine, which binds to ligand gates so sodium ions can enter the muscle fiber.
Explanation:
Skeletal fiber contractions are based on different physiological and biochemical phenomena that happen in every cell. These phenomena are due to stimulation produced by somatic motor neurons, which axons get in contact with muscle fibers through a neuromuscular synapse. In rest, attraction strengths between myosin and actin filaments are inhibited by the tropomyosin. When an action potential is originated in the central nervous system, it travels to the somatic motor neuron membrane: the muscle fiber, and activates the calcium channels releasing it in the neuron. Calcium makes vesicles to fuse with the membrane and release the neurotransmitter named acetylcholine (Ach) into the synaptic space in the juncture. Then, Ach binds to its receptors on the skeletal muscle fiber. This causes the ion channels to open, and positively charged sodium ions cross the membrane to get into the muscle fiber (sarcoplasm) and potassium get out. The difference in charges caused by the migration of sodium and potassium makes the muscle fiber membrane to become more positively charged (depolarized). The action potential caused by this depolarization enters the t-tubules depolarizing the inner portion of the muscle fiber. This activates calcium channels in the T tubules membrane, that make the calcium be released into the sarcolemma. At this point, tropomyosin is obstructing binding sites for myosin on the thin filament. When calcium binds to the troponin C, the troponin T alters the tropomyosin by moving it and then unblocks the binding sites. Myosin binds to the uncovered actin-binding sites, and while doing it ATP is transformed into ADP and inorganic phosphate. Z-bands are then pulled toward each other, thus shortening the sarcomere and the I-band, and producing muscle fiber contraction.
Some present-day bacteria use a system of anaerobic respiration characterized by an electron transport chain analogous to that found in aerobic organisms. Which of the following correctly characterizes the anaerobic electron transport chain?
a. It uses oxygen as a final electron acceptor.
b. It is embedded in the outer mitochondrial membrane rather than the inner mitochondrial membrane.
c. It establishes a proton gradient between the cytoplasm and the extracellular fluid.
d. It establishes a proton gradient between the intermembrane space and the cytoplasm.
e. None of these answer options accurately characterizes the anaerobic electron transport chain.
Answer:
The correct answer would be:
Neither of these response options accurately features the anaerobic electron transport chain.
Explanation:
The anaerobic respiration system vibrated by an electron transport chain is a mechanism that anaerobic bacteria have to maintain their respiration.
This mechanism does not require oxygen in the atmosphere, that is why it is said to be an anaerobic mechanism.
Bacteria do not all need oxygen in the environment to live, some need that oxygen is not exactly present (strict anaerobes) or that it is at low partial pressures (facultative anaerobes).
This mechanism is very characteristic in its location since it is located in the inner membrane of the mitochondria, that is why it will decide to indicate that option as the correct one.
If two people with sickle cell trait have children, what is thechance that a child will have normal RBCs in both high-and low-oxygen environments? What is the chance that a child will have sickle cell disease? Write the possible genotypes in the Punnettsquare.
Answer:
See the answer below
Explanation:
The chance that a child from two people with sickle cell trait will have normal RBCs remains the same irrespective of the amount of oxygen in the environment. From the cross:
AS x AS
AA AS AS SS
Hence, the chance of having a child with normal RBCs in both high and low-oxygen environments is 1/4 or 25%.
The chance that a child will have sickle cell disease is also 1/4 or 25%.
The possible genotypes in a Punnet's square can be seen in the attached image
Where does most of the phosphorus cycle take place?
Explain TWO strategic ways employed by microbes of extreme environments that enable them withstand harsh environmental and physical conditions
Answer:
Explanation:
Some microbes are thermophiles and they can survive in area with high temperature between 45 -80°C, they are chemoautotroph in nature, oxidizing sulphur to products acids such as sulfur in the environment. This acid also help them to better adapt to the environment as many thermophiles likes acidic environment.
Thermophiles body has saturated and straight chain fatty acid that helps prevent denaturation which enables them grow and thrive in harsh weather condition by providing the fluidity that is needed in membrane function.
Thermophiles are also small in sizes this ensure there stability.
When analyzing a cross involving two traits, each trait is analyzed separately, and then the frequencies of each are combined to yield the observed phenotypic ratios. Group of answer choices
Answer:
The correct answer is "True".
Explanation:
The missing options of this question are "true" or "false" and in this case the correct answer is "true". According to the laws of inheritance established by Charles Darwin, the certain traits of species can be analyzed and studied by using crossing experiments. These experiments are performed first by analyzing the traits of each individual separately and second by observing the frequencies of each are combined to yield the observed phenotypic ratios. Different approaches are used to study the frequencies of each allele, and the most widely used is the punnet square approach.
Which is NOT a characteristic of the
climax community?
a) it had a well-drained spatial structure
b) it has a wide variety of species
c) it has an unbalanced ecosystem
d) it has complex food chains
The function of the plasma membrane is....
Answer:
to protect the cell from it's surroundings
Explanation:
the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells
Explanation:
The primary function of the plasma membrane is to protect the cell from its surroundings.
Sorry if the ans is wrong
For aerobic respiration, a variety of substances must be in a state of flux across the inner mitochondrial membrane. Assuming a brain cell in which glucose is the sole energy source, indicate for each of the following substances whether you would expect a net flux across the membrane and, if so, in which direction.
1. electrons
2. pyruvate
3. oxygen
4. ATP
5. ADP
6. Acetyl CoA
7. Glyceral-3-phosphate
8. NADH
9. FADH2
10. Oxaloacetate
11. Water
12. Protons
Answer:
Explanation:
Pyruvate inflow; as this is needed to initiate the link reaction reactions that gives acetyl CoA. The latter enters the Kreb's cycle to provide the electrons carried in hydrogen atoms by NADH and FADH2 for ocidative phosphorylation for ATPs synthesis.
Oxygen Inflow, to accept the final electrons for the electron transport chains to continue.
Electron inflow ,carried in hydrogen atoms by NADH and FADH2 , to produced the electron transport chain, needed to generate the PMF.
ATP-outflow; this is the end product of the oxidative phosphorylation. it is synthesized by the ATPase synthase enzyme. using the energy from the electrochemical gradients.
ADP Inflow- it mus be phosphorylated by phosphate to form ATPs during synthesis, as catalysed by ATPase synthase.
Acetyl Co A. this is no net change,
Oxaloactate - no net change, the amount of this must remain contant in the kreb's Cylce, because of continuous formation from pyruvate.
NADH and FADH2 are co enzymes needed to ferry Hydrogen atoms into the matrix,to extract electrons.(inflow)
water is liberated from the matrix , therefore it goes out -from the reaction of oxygen and hydrogen (proton)in the matrix
Protons inflow into the intramembrane of the mitochondrial .
Glyceride -3-phosphate -no net flow, because it is further broken down to form pyruvate as it is continuous formed from phosphorylated glucose.
'
2. Where does cellular respiration take places in the cell?
Answer:
Explanation:mitochondria
The enzymatic reactions of cellular respiration begin in the cytoplasm, but most of the reactions occur in the mitochondria. Cellular respiration occurs in the double-membrane organelle called the mitochondrion. The folds in the inner membrane are called cristae.
Answer:
IT TAKES PLACE IN THE CYTOPLASM BUT MOST OF THE REACTIONS TAKE PLACE IN THE MITOCHONDRIA
Explanation:
Cellular respiration occurs in the double-membrane organelle called the mitochondrion
HOPE IT HELPS
Which gas is a major contributor to ocean acidification? A. oxygen B. sulfur dioxide C. carbon dioxide D. nitrogen
Answer:C, carbon dioxide.
Explanation:Carbon Dioxide reacts with water forming Carbonic acid. This acid increases the acidity of the ocean.
Answer:
Explanation: got it correct
Calculate the rate of photosynthesis (mm/hr) for Elodea if when measuring net photosynthesis, the water level moved up 7mm from the initial level in 10 min, and when measuring cellular respiration it took 15 minutes for the water level to move down 1 mm.
Answer:
With 6 we should multiply gross photosynthesis (as we were measuring gross photosynthesis for 10 min).
Explanation:
According to this question:-
Net photosynthesis- 3mm/20min- 1.5mm/10min
Cellular respiration- 1mm/15min- 0.66mm/10min
Gross photosynthesis = Net photosynthesis + Cellular respiration = 1.5+0.66 = 2.16 (mm/10min)
Rate of photosynthesis = (gross photosynthesis)6 = 2.16 *6 = 12.96 mm/hr
As we gage the photosynthesis rate in hr.
The process of photosynthesis is commonly written as 6CO2 + 6H2O → C6H12O6 + 6O2.
With 6 we should always multiply gross photosynthesis (as we were measuring gross photosynthesis for 10 min).
This means that the reactants, six CO2 molecules, and 6 water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and 6 oxygen molecules, the products.
According to this question:-
Net photosynthesis- 3mm/20min- 1.5mm/10min Cellular respiration- 1mm/15min- 0.66mm/10min
Gross photosynthesis = Net photosynthesis + respiration = 1.5+0.66 = 2.16 (mm/10min)
Rate of photosynthesis = (gross photosynthesis)6 = 2.16 *6 = 12.96 mm/hr
As we gauge the photosynthesis rate in hr.
Therefore, the correct calculation of photosynthesis is 6=2.16=12.96mm/hr.
Learn more about the photosynthesis calculation:
https://brainly.com/question/12372353
10. How is Soil formed? What is Soil Erosion?
Answer:
soil is formed by weathering of rocks
soil erosion is the removal of the top soil by agents of erosion such as water, wind and ice
Soil is formed by various factors:
The Sun heats up rocks during the day so that they expand. At night, these rocks cool down and contract. Since all parts of the rock do not contract and expand at the same rate, this results in crack formation and huge rocks break up into smaller pieces.Water is another factor for soil formation. Water could get into the cracks in the rocks formed due to uneven heating by the Sun. If this water later freezes, it would cause the cracks to widen. Flowing water wears away even hard rock over long periods of time. Fast flowing water often carries big and small rock particles downstream. These rocks rub against each other and the resultant abrasion causes the rocks to wear into smaller and smaller particles. The water takes these particles along with it and deposits it further down its path. Soil is thus formed in places far away from its parent-rock.Wind also erode rocks down. The wind also sand from one place to the other.Living organisms also influence the formation of soil. The lichens grow on the rock surfaces. It releases certain substances that cause the rock surface to powder down and form a thin layer of soil. Other small particles like moss, are able to grow on this surface now and they cause the rock to break up further. The roots of big trees sometimes go into cracks in the rocks and as the roots grow bigger, the crack is forced bigger.Thus, soil is formed like this.Removal of the topsoil is known as the soil erosion.Hope you could get an idea from here.
Doubt clarification - use comment section.
What is the shape of an Acid-fast bacteria?
In 1668 Francesco Redi did a series of experiments on spontaneous generation. He began by putting similar pieces of meat into eight identical jars. Four jars were left open to the air, and four were sealed. He then did the same experiment with one variation: instead of sealing four of the jars completely, he covered them with gauze (the gauze will exclude the flies while allowing the meat to be exposed to air). In both experiments, he monitored the jars and recorded whether or not maggots (young flies) appeared in the meat.
Refer to the paragraph on Redi's experiments. In both experiments, fies appeared in all of the open jars and only in the open jars. Which one of the following statements is correct?
A. The experiment was inconclusive because it did not nun long enough
B. The experiment supports the hypothesis that spontaneous generation occurs in rotting meat.
C. The expertment supports the hwpothesis that maggots arise only from eggs laid by adult flhes
D. The experiment was inconclusive because Redi used only one kind of meat
Answer:
The experiment supports the hypothesis that maggots arise only from eggs laid by adult flies; that is only from reproduction and development.
Explanation:
The objective of this experimental set up by Francesco Radi was to demonstrate the concept of spontaneous generation. He concluded that, Maggots are not spontaneous generated from rotten meats, rather they are products of eggs laid by houseflies who visited the rotten meat to lay eggs. The maggots (larva) are products of complete metamorphosis, from egg to larva to pupa and adult. This is an indication that, new organisms are not formed form spontaneously, but are products of well-defined process of reproduction and development which in this case is a complete metamorphosis.
Based on this premise he concluded that, if maggots were products of laid eggs, then they should appear only when rotten meat is exposed to open air.However,if they are f products of spontaneous generation they should appear irrespective of the meat exposure to air or not.
Jack has just returned from the hospital where Jack's father is recovering from a heart attack. The doctors told Jack that his dad's atherosclerosis is very serious. Jack and his wife, Melanie, are worried about Jack's father and also are starting to think about Jack's risk of also having heart disease in his lifetime. He sets up an appointment at his doctor's office and has his blood lipid levels evaluated for the first time. Let's see if you can answer some of the questions that Jack and Melanie have. Which risk factor does Jack have no control over?a. Obesityb. Geneticsc. Stressd. Atherogenic diete. Jack can change all of these risk factors.
The correct answer is B. Genetics
Explanation:
In health, a risk factor is a variable that can make a patient more likely to develop a disease or condition. Additionally, some of these factors can be controlled or changed by the patient, while others cannot be modified. Factors that can be controlled include stress, diet, weight, alcohol intake, and habits. This does not apply to factors such as age or genetics, for example, in the case of genetics, this is determined by the genes of each parent when a human being is formed, and therefore there is not any way to change this; although factors such as diet, stress, or smoking affect the expression of mutations in genes. Thus, the risk factor Jack has no control over is genetics.
How are lysosomes pro-nuclear dense bodies?
Answer:i hope this answers ur question
Explanation:
Hurry please!!!
Which statement accurately describes long-term environmental changes?
Long-term environmental changes cause changes in genetic makeup.
Long-term environmental changes happen suddenly with little warning,
Long-term environmental changes occur in hundreds of years.
Long-term environmental changes immediately affect organisms in the environment
Answer:
A. or #1 -- Long-term environmental changes cause changes in genetic makeup
Explanation:
Answer: A
Explanation:
WORLD POPULATION GROWTH
20.000
10.000
World
5.000
Asia
Millions of people
2.000
Africa
1.000
Europe
500
200
United States
Mexico, Canada, & Greenland
100
Central America,
50 Caribbean Islands, &
South America
Oceania (Australia &
nearby islands in the Pacific)
10
1980
1950
1960
1970
1990
Year
Based on the information in the graph, which region's population will grow the
most in the next 40 years?
2000
2010
2020
2030
2040
2050
O A. Europe
O B. United States
O C. Asia
D. Africa
Answer:
option D
Explanation:
more than half of global population growth between now and 2050 is expected to occur in Africa. Africa has the highest rate of population growth among major areas
Based on the information in the graph, it is clear that Africa's population will grow the most in the next 40 years. Therefore, option (D) is correct.
Population refers to the total number of individuals of a particular species living in a specific geographic area at a given time. It is an important concept in ecology, as the size of a population can have significant impacts on the environment, other species, and human societies.
Populations can be studied at different levels of organization, from individual organisms to entire ecosystems, and can be characterized by a range of variables, including age structure, sex ratio, population density, and growth rate. Understanding population dynamics and how they are affected by factors such as competition, predation, disease, and human activities is crucial for effective conservation and management of natural resources.
Africa's population is currently only at 1,000 million people, which is much smaller than the population of Asia, which is at millions of people. Additionally, the graph shows that Africa's population is projected to increase rapidly in the coming decades, while other regions are projected to have more modest increases.
Learn more about population, here:
https://brainly.com/question/27991860
#SPJ7
The largest taxon and consists of all the other taxis called
Answer:
Domain
Explanation:
in humans unattached earlobes are dominant over attached earlobes. which could be the genotybe for someone with attached earlobs/Answer/a is Ee/b is e/c is ee/D is E
Answer:
C. ee
Explanation:
attached earlobes isn't the dominant trait, if it isn't dominant then it'll have lower case letters to represent it
Answer:
C
Explanation
hopes this helps :]
What is cell? How does it work
Answer: They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. Cells also contain the body's hereditary material and can make copies of themselves. Cells have many parts, each with a different function. Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. ... Cells have many parts, each with a different function.
Explanation:
The hinged leaf structure of the Venus flytrap is necessary because this plan must survive in the environment that is low in available
Sunlight
Water
Nitrogen
Space
You are growing plants hydroponically (rooted in an aqueous solution rather than soil). The solution for the control group of plants contains normal levels of salts and nutrients, while the solution for the treatment group has a high concentration of large molecular weight solutes that are excluded by roots. You find that the plants in the treatment group are, on average, smaller than those in the control group, but there is no significant difference between the groups in the amount of CO2 being fixed by the average plant. What differences between groups, at the cellular level, would you expect to make an important contribution to the difference in size of the shoots
Answer:
controlled group has higher cell wall extensibility and they grow faster
Explanation:
How Can Regulation be Accomplished? Chemotaxis by Pseudomonas aeruginosa requires regulation of macromolecules in response to signals. Protein regulation is very important and can be grouped into two categories: those that are based on protein activity and those that are based on the amount of protein present ,write the type of regulation described that does not affect the amount of protein present.
1. regulating amount of mRNA made
2. catabolite repression
3. post-translational modification small RNA (sRNA) regulation regulation of transcription
4. attenuation controlling whether mRNA is translated
Answer:
3. post-translational modification small RNA (sRNA) regulation regulation of transcription
Explanation:
The post-translational modification does not affect the amount of protein present because this type of change is only done to the protein when the translation process has finished, and there is a protein as a result. After the translation, the final product can suffer modifications such as the addition of different components, or enzymatic modifications. In other words, they are chemical changes that the protein experiences that do not affect the amount of protein present.
"Rank the sequence of cross bridge cycling, starting with the myosin-binding sites being exposed and ending with relaxation due to cross bridge cycling ending. Do not overlap any events."
Sequence:
a. Calcium ions pumped into the sarcoplasmic reticulum
b. Myosin head forms cross bridge with actin
c. Myosin binding sites covered
d. Power stroke moves thin filament
e. Cross bridges detach from actin
f. Myosin head is re-energized
g. Calcium ion concentration decreases below the threshold for binding to troponin
h. ATP attaches to myosin head
Answer:
Explanation:
This is the process of muscle contraction and relaxation in the muscle. The type of muscle involved is the skeleton muscle.
The process is initiated in the Central nervous system. Examples are in contraction of biceps and triceps.
It involves myosin head and actin filament coupled with the release of calcium ion from the sarcoplasm reticulum: this ion activates this process in the muscles. With the exposure of the music binding site on the acting filament, myosin is able to bind to acting filament bringing about this process.
a. ATP attaches to myosin head
b. Myosin head is re-energized
c. Myosin head forms cross bridge with actin
d. Power stroke moves thin filament
e. Cross bridges detach from actin
f. Myosin binding sites covered
g. Calcium ions pumped into the sarcoplasmic reticulum
h. Calcium ion concentration decreases below the threshold for binding to troponin.
Muscle contraction results from the interaction between actin and myosin filament proteins.
During muscle contraction, ATP binds to myosin, which passes to a high-energy state and it allows actin and myosin to detach from each other.The sarcoplasmic reticulum (SR) is a specialized type of endoplasmic reticulum in muscle cells that acts to regulate the concentration of cytosolic calcium (Ca2+).The sequential steps are as follow:
Myosin head forms cross bridge with actinPower stroke moves thin filamentATP attaches to myosin headCross bridges detach from actinMyosin head is re-energizedCalcium ions pumped into the sarcoplasmic reticulumCalcium ion concentration decreases below the threshold for binding to troponinMyosin binding sites coveredIn conclusion, muscle contraction results from the interaction between actin and myosin filament proteins.
Learn more in:
https://brainly.com/question/7302891?referrer=searchResults
During which phase of the cell cycle do chromatids form?