Natural selection is referred to as a struggle where organisms fight for necessities of life where those suited to their environment will survive and reproduce.
What is Environment?This is referred to as a sum total of all the living and non-living elements and their effects that influence life in an ecosystem.
Natural selection occurs when several types of changes occur in some members of a species of organism thereby resulting in them having an advantage over the others in terms of their daily activities. They are able to hunt or eat more food and are better adapted for mating which increases the reproductive rate.
They fight for necessities of life and those who are more suited to their environment will survive and reproduce while those who aren't will die out thereby making it the correct choice.
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Explain how a change in the subunits of a polymer may lead to changes in structure or function of the macromolecule.
They consists of the proteins , nucleic acids polymers and sequences of macromolecules that can evolve and changed the composition, that leads to evolutionary change and hence structural diversity .
Macromolecules are polymers, which are long chains of subunits called monomers. These subunits are often very similar to each other, and for all the diversity of polymers.
Proteins are one of the important and abundant organic molecules in living systems and have the most diverse range of functions from all the macromolecules. Their are Many properties of protein they can be structural, regulatory, contractile, or protective and also serve in transport, storage, or membranes.
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which are found entirely attached to the pons, and which are located in the groove between the pons and medulla?
Bony Clivus are found entirely attached to the pons and Cerebellar peduncle are located in the groove between the pons and medulla.
Pons is the forepart of the hindbrain arranged before the cerebellum. Pons is nonstop behind and underneath with the medulla oblongata. Pons is isolated from medulla in front by a wrinkle in which the abducent, facial, and acoustic nerves show up. Trigeminal nerves arise at the intersection of pons and center cerebellar peduncle.
Foremost surface of pons is raised and has a sulcus in midline called basilar sulcus which is involved by basilar vein. Better surface of pons is connected than predominant cerebellar corridor and lower surface is connected with foremost substandard cerebellar supply route. Back surface of pons is concealed by cerebellum and limited horizontally by unrivaled cerebellar peduncle .
On one or the other side of the lower part of the pons there is a locale called cerebellopontine point. The facial, vestibulocochlear, glossopharyngeal nerves; apprehensive intermedius; and complex veins lie around here
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multiple select question select all that apply of the four types of chromosomal rearrangements, which ones change the total number of nucleotides? multiple select question. duplications deletions inversions reciprocal translocations
The correct options are duplications and deletions. Both these chromosomal rearrangements are types where total number of nucleotides get changed.
Chromosome rearrangements involve missing, duplicated (additional copies), or rearranged sections of chromosomes. The results differ. They rely on the chromosomes involved and the manner of their rearrangement. Some have little impact, some can't coexist with life, while others fall somewhere in the middle. In the context of genomics, duplication is a form of mutation in which one or more copies of a DNA segment are created. This DNA segment might be as tiny as a few bases or as large as a significant chromosomal region. All creatures experience duplications. When a chromosome breaks, some genetic material is lost, which is known as a deletion. Anywhere along a chromosome, deletions can be tiny or massive. Duplications. When a portion of a chromosome is improperly copied, duplications happen (duplicated).
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Which postulate of natural selection is deliberately enforced by dog breeders using artificial selection?.
Dogs Breeders use artificial selection rather than natural selection to determine survival and reproduction.
What is the underlying theory behind animal natural selection?An evolutionary mechanism is natural selection. Environment-adapted organisms are more likely to endure and pass on the genes that made them successful. As a result of this strategy, species eventually develop and diverge.
What is the natural selection theory's alternate name?The term "theory of evolution" is most often used to refer to the concept first proposed by Charles Darwin and Alfred Russel Wallace in the nineteenth century.
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What does Biology study?
A.) the structure and function of living organisms.
B.) the classification of living organisms.
C.) the interactions of living organisms.
D.) all of the above
Which letter choice is correct? A, B, C, or D?
What explanation of inheritance suggests that hereditary traits are determined by discrete units that are transmitted from one generation to the next?.
Particulate inheritance is the explanation of inheritance suggests that hereditary traits are determined by discrete units that are transmitted from one generation to the next.
Particulate inheritance is a pattern of inheritance discovered by Mendelian genetics theorists such as William Bateson, Ronald Fisher, and Gregor Mendel himself, demonstrating that phenotypic traits can be passed down from generation to generation via "discrete particles" known as genes, which can retain their ability to be expressed while not always appearing in descending generations.
These principles make up the system of particulate inheritance by units, or genes. Mendel's two basic laws, known as the law of segregation and the law of independent assortment, were later supported by the discovery of chromosomes as carriers of genetic units. This was a significant step forward from blending inheritance because it explained how heritable variation can persist across multiple generations.
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you have a micro tube containing 1 ml of a solution with 5.57 x 100 cells/ml and you are to produce a solution that contains 55 cells/ml. what dilutions should you perform?
Dilute the aliquot three times, each time transferring 1 microL into 900 microL diluent.
Dilution is the process of weakening a liquid by mixing it with water or another liquid: Before adding the bleach to the wash, dilute it in water. When you dilute a substance, you make it weaker or less pure by mixing it with another substance. Serial dilution is a common method for achieving this concentration reduction. Dilution of homoeopathy. Dilution (equation), a formula for calculating the rate at which a gas dilutes. Trademark dilution is a type of illegal trademark use that occurs outside of the relevant market. A microliter(microL) is a volume unit equal to one millionth of a liter (one-millionth).
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Information received by sensory cells is conveyed to the central nervous system in the form of impulses along afferent fibers. In order for this to happen when the receptor cell is not a neuron, its receptor potential ______.
In order to convey the information received by sensory cell, the receptor cell must be transferred to a neuron
Sensory transduction is carried out by two main categories of cellular systems. In the first, a neuron collaborates with a sensory receptor, a cell, or a cell process that has been designed specifically to interact with and detect a given stimuli. The afferent neuron that is connected to the sensory receptor is activated when it is stimulated, and it then sends information about the stimulus to the central nervous system. The second sort of sensory transduction involves a sensory nerve ending reacting to an environmental stimuli, either internal or external.
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T/F? For humans, food is the only source of vitamin D.
Answer:
False
Explanation: Unlike other nutrients, human body is capable of producing vitamin D upon exposure to UV rays from the Sun
In the snail Cepaea nemoralis, an autosomal allele causing a banded shell, u, is recessive to the allele for an unbanded shell, U. Genes at a different locus determine the background color of the shell. The allele for a yellow shell, b, is recessive to the allele for a brown shell, EB. A banded, yellow snail is crossed with a homozygous brown, unbanded snail. The F1 progeny are then crossed with banded, yellow snails in a testcross. Predict the percentage of progeny in each phenotype if the two genes are linked with no recombination, if the two genes assort independently, and if the genes are 20 m.u. apart. Place the percentage for each phenotype for each of the scenarios in the table below. Percentages can be used more than once. Phenotyp Linked Independent Genes 20 m.u. no recombinationassortment apart Brown, unbanded Brown, banded Yellow, unbanded Yellow, banded 0% 10% 20% 25% 30% 40% 50% 60%| 70% 75% | 80%, 90% 100%
The F2 testcross offspring will be half-banded, yellow, and half unbanded, brown.
Absolute linkage prevents the creation of recombinant offspring. The F1 inherited banded and yellow alleles (BBCY) from the banded yellow parent together on one chromosome and unbanded and brown alleles (BOCBw) from the unbanded brown parent jointly on the homologous chromosome.
These two allelic combinations will be present in equal amounts in all F1 gametes in the absence of recombination. The F2 testcross offspring will therefore be half banded, yellow, and half unbanded, brown.
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Fmri studies at cleveland clinic and case western reserve university found the social network (part of the default node network) in the brain is activated by. (select all that apply. ).
The brain's default mode network (DMN) is made up of regions that are normally more active when the body is at rest than when doing an active task. However, recent research has indicated that specific activity types can activate this network.
It has been proposed that social cognition, particularly higher-order activities like attributing mental states to others, activates a network of regions that at least partially overlap with the default mode network DMN. Here, we investigate this assertion using data from functional MRI meta-analyses and current investigations into the anatomical and functional connections of the social brain. We also go through recent data supporting the presence of a DMN in non-human primates. We wrap up by going over some of these observations' implications.It is now becoming more and more clear that specific sorts of tasks cause the brain regions connected to the DMN to become active. In fact, the supposed anti-correlation between task-related networks and the DMN has been questioned (Murphy et al., 2009; Kelly et al., 2012).
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what would be the phenotypic ratio of offspring if a balck and white hen has chicks with a ablack andw hiter ooster
We examine a alleles of the parent organisms and predict how frequently the offspring will exhibit those genes to determine a phenotypic ratio. Most of the time, we are aware of the expression and appearance of the alleles.
What happens whenever a black chicken and a white chicken are crossed?The offspring's genotype will be BW.When both alleles express in the phenotypic and neither of these two alleles is able to predominate over the other, the color of the feathers will be black and white.
What results from crossing a black-and-white chicken?It would result in progeny that were half black and half white if bred back to the father of these birds.
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excess fluid consumption can result in a condition called . multiple choice chronic hypotension terminal osmosis idiopathic rehydration water intoxication
Excess fluid consumption can result in a condition called water intoxication.
Water intoxication is a condition that arises as a result of drinking too much water. This occurs when you drink more than a liter of water in an hour, causing your kidneys to work harder. When you drink mostly water, the body will be prone to hyponatremia, a condition in which the salt level in the blood is lower than normal. This happens because the excess air in the body will "dissolve" the salt (sodium) so that the salt level will be relatively lower.
Sodium is an important component in fluid and electrolyte balance in the body. A lack of sodium can make fluids in the body attracted to cells, such as brain cells. As a result, the cells will swell and cause several significant symptoms such as impaired consciousness and even life-threatening.
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which means of particle transport is shown in the figure below
Answer: Exocytosis
Explanation:
Choose the CORRECT statement that reflects the differences between the somatic and autonomic nervous systems.
The SNS only uses the neurotransmitter norepinephrine, while the ANS only uses the neurotransmitter acetylcholine.
The SNS is a two-neuron system, while the ANS is a one-neuron system.
The SNS is excitatory, while the ANS is both excitatory and inhibitory.
The SNS innervates cardiac muscle, while the ANS innervates skeletal muscle.
The SNS can innervate glands, while the ANS cannot innervate glands.
(the SNS is excitatory, while the ANS is both excitatory and inhibitory)
The CORRECT statement that reflects the differences between the somatic and autonomic nervous systems is while the ANS is both excitatory and inhibiting in GI, the SNS is excitatory.
While also controlling mucosal secretion and GI blood flow through neurally mediated vasoconstriction, the sympathetic nervous system has a primarily inhibitory impact on GI muscle. Contrarily, the parasympathetic nervous system controls the tone and motility of the stomach and intestines including milling, absorption, secretion, and defecation by acting in both an excitatory and an inhibitory manner. This suggests a more complex and finely tuned role for the parasympathetic nervous system in GI activity. The autonomic nerve system is in charge of GI functions.
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What name is given to the process in which a strand of dna is used as a template for the manufacture of a strand of pre-mrna? what name is given to the process in which a strand of dna is used as a template for the manufacture of a strand of pre-mrna? rna processing gene expression polypeptide formation transcription translation.
During transcription, the DNA of a gene serves as a template for complementary base pairing, and an enzyme called RNA polymerase II catalyzes the formation of a pre-mRNA molecule.
Transcription begins when RNA polymerase binds to a promoter sequence near the start of a gene directly or through helper proteins. RNA polymerase uses one of the DNA strands, the template strand, as a template to make a new complementary RNA molecule. Transcription ends in a process called termination. Transcription is the process by which information from a DNA strand is copied into a new messenger RNA (mRNA) molecule. DNA and Protein Synthesis The process of making mRNA from DNA is called transcription and occurs in the nucleus. The mRNA directs protein synthesis, which occurs in the cytoplasm. The mRNA formed in the nucleus is transported out of the nucleus and into the cytoplasm where it binds to ribosomes.
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Ethane, C2H6, reacts with oxygen to make carbon dioxide and water. The
equation can be written as: C2H6+02 → CO2 + H20. Using the equation,
what are the products?
O CO2 + H20.
OC2H6+02
OC2H6
O 02 + H20
The products of the above reaction are carbondioxide and water i.e. CO₂ + H₂0 (option A).
What is a chemical reaction?Chemical reaction is the process, typically involving the breaking or making of interatomic bonds, in which one or more substances are changed into others.
A chemical reaction involves substances called reactants forming other new substances called products.
According to this question, Ethane reacts with oxygen to form carbon dioxide and water as follows:
C₂H₆ + 0₂ → CO₂ + H₂0
Based on the above equation, glucose and oxygen are the reactants while carbondioxide and water are the products.
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many plants in tropical rainforests have stomata that are continuously open. if water levels in the soil decrease, but there is still enough water to support normal levels of photosynthesis, what would you also expect to observe?
many plants in tropical rainforests have stomata that are continuously open. Rainfall levels will decrease if water levels in the soil decrease, but there is still enough water to support normal levels of photosynthesis.
Tropical rainforests are wildernesses that take place in regions of tropical rainforest climate in which there is no extremely dry - all seasons have at least a 50 inches of precipitation - and also are known as lowland equatorial evergreen rainforests. Stomata are cell structures in the epidermis of tree leaves and needles that help plants exchange carbon dioxide and water with the atmosphere.
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Find the similarity between the shape of bullet train and the shark. What is the name of this kind of shape? Also, tell the reason behind such a shape
The similarity between the shape of bullet train and the shark is both are streamlined.
A streamlined body is a shape that reduces the friction drag between a fluid, such as air or water, and a moving object. Its unique body shape provides very little resistance to air and water. The water surface of airplanes and ships is streamlined to reduce fluid friction.
These structures have a streamlined profile with a fusiform design that resembles an elongate teardrop with a rounded leading edge that extends to a maximum thickness and a slowly tapering tail.
The streamlined shape of high-speed bullet trains aids in the reduction of air drag or fluid friction acting on the train. When an object moves through air, it encounters air resistance, which is nothing more than a drag that slows the object's speed.
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\make connections if you arrested a human cell in metaphase i of meiosis and applied this technique, what would you observe? how would this differ from what you would see in me
The cell's tetrads gather on the metaphase plate, which is situated in the middle of the cell's two opposing ends, during metaphase one. A single cell divides twice during a process called meiosis.
The spindle fiber's then catch hold of the centromeres on each chromosome to attach themselves to them. Before proceeding to the following stage of meiosis I, the cell then verifies if the chromosomes are correctly positioned. The meiosis process has a single, brief stage called the metaphase that happens twice, once during meiosis I and once during meiosis II. A single cell divides twice to produce four haploid daughter cells during the meiotic process. The gametes, or sperm and egg in males and females respectively, are these cells.
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do we need to be concerned with the wave nature of the blood cells when we describe the flow of blood in the body?
The blood cells need to be concerned wgen under the Broglie's relation it's no concern issues.
If we begin from de Broglie's relation
lambda=frac λ= mvh and insert the given values lambda=frac 63 instances 10^} instances 4 times 10^}=1.66 10^textrmλ= 10 −14 ×4×10 −3 6.63×10 −34 =1.6610 −17 m lambdaλ is simply too small so we don't have any issues approximately wave nature of the blood cells.
λ=1.6610 −17 m that is too small so we don't have any issues approximately wave nature of the blood cells.
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which respiratory-associated muscles would contract or relax during forced expiration, for example blowing up a balloon?
The internal intercostal and abdominal muscles would contract or relax during forced expiration.
The intercostals, parasternals, scalene, and neck muscles of the rib cage, which mostly affect the upper section of the rib cage (pulmonary rib cage), are both inspiratory and expiratory muscles. The abdominal muscles have an expiratory function and work on the rib cage and abdomen. In order to expel air from the lungs during expiration, the abdominal wall contracts concentrically while the diaphragm contracts eccentrically in tandem with the elastic recoil of the lung tissue.
The abdominal muscles are primarily responsible for forcing expiration. For physiologic processes like coughing and properly responding to a gag reflex, these muscles must be under good control. Both of these activities are essential for health and security.
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of the seven iucn categories of protected marine areas, which one intends maximum protection, and which one is designed to benefit species and ecosystems, respectively?
A protected area, according to the IUCN, is a clearly defined geographic area that is ecosystems acknowledged, designated, and managed in order to ensure long-term conservation
Preserving the ecosystems that animals and plants require to exist is the best method to protect endangered species and biodiversity. The environment in which all animals and plants exist will be protected by energy conservation and judicious resource utilization.
In order to protect biodiversity, maintain ecosystem balance, preserve important habitats, increase resilience to climate change, ensure global food security, maintain water quality, conserve natural resources, promote economic success, and stop the.
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Carcinogens cause _____.A.allergic reactionsB.genetic defectsC.chronic health effectsD.birth defectsE.cancerE. Cancer
The main one is E. Cancer
a food web and an energy pyramid are represented below. a group of organisms from the food web carry our the life process of respiration?
A food chain is a group of organisms that eat one another, allowing energy and nutrients to flow from one to the next.
In ecostem, a food web is made up of all the food chains in one ecosystem. Every living thing in an ecosystem is a part of several food chains. Each food chain represents one possible path for energy and nutrients as they move through the ecosystem. A food web is made up of all of the interconnected and overlapping food chains in an ecosystem.
Many different food chains and trophic levels are linked by food webs. Food webs can support long and complicated food chains as well as very short ones.
For example, grass in a forest clearing uses photosynthesis to produce its own food. A rabbit consumes grass. The rabbit is devoured by a fox. When a fox dies, decomposers like worms and mushrooms decompose its body and return it to the soil, where it provides nutrients to plants like grass.
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nlrs differ from tlrs by . . . choose one:a. being present on the pathogen rather than the host cell.b. detecting mamps in the cytoplasm rather than external to the cell.c. triggering only adaptive immunity rather than innate
By recognizing MAMPS inside the cell as opposed to outside it, NLRS differ from TLRS. RLRs recognize pathogen genome, while NLRs mostly detect intracellular bacteria.
Two important types of innate immune sensors, Toll-like receptors (TLRs) and Nod-like receptors (NLRs), offer prompt responses to pathogenic invasion or tissue damage. By interacting with damage/danger-associated molecular patterns (DAMPs), pathogen/microbe-associated molecular patterns (MAMPs), pathogen-associated molecular patterns (PAMPs), and xenobiotic-associated molecular patterns (MAMPS ), the TLRs become activated.
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what are the two basic types of ecological succession which are categorized mainly based on how many nutrients - or lack thereof - are already present in the soil after the disturbance?
The two basic types of ecological succession are Primary and Secondary.
What is Ecological succession ?Ecological succession is the process of change in an ecological community's species composition over time. The time frame can span several decades or fewer (for instance, following a wildfire).The cycling of nutrients like carbon, nitrogen, and sulphur is made possible by bacteria.The community grows through an increase in complexity from a small number of pioneering plants and animals to a stable or self-sustaining climax community. The effects of established organisms on their own settings serve as the "engine" of succession and the reason why ecosystems evolve. Living has the effect of changing one's environment, sometimes subtly and sometimes blatantly.To learn more about Ecological succession refer to:
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many viruses cause what are referred to as flu-like symptoms as a result of the body's response to the infection. these symptoms include .
White blood cells, antibodies, and other mechanisms go to work ridding your body of the foreign invader. In fact, many of the symptoms that a person suffers during an infection (fever, malaise, headache, rash) are the result of the activities of the immune system trying to clear the infection from the body.
The flu is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and sometimes the lungs. Influenza-like illness (ILI), also called “influenza-like illness,” is a broader category. The CDC says that with ILI, you have a fever of at least 100 F and a cough or sore throat, but the cause of the symptoms is unknown. Colds are minor infections of the nose and throat caused by more than 200 different viruses. Rhinovirus is the most common cause, accounting for 10 to 40 percent of colds. Other common cold viruses include the coronavirus and respiratory syncytial virus (RSV). The flu is caused solely by influenza viruses, while the common cold can be caused by several different viruses, including rhinoviruses, parainfluenza, and seasonal coronaviruses. Seasonal coronaviruses should not be confused with SARS-CoV-2, the virus that causes COVID-19.
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Which cerebral lobe is responsible for voluntary motor function, motivation, memory, mood, and aggression?.
Our personality resides in the frontal lobes, which are thought to be our emotional control center.
What does each brain lobe control?The frontal lobe plays a key role in cognitive processes and in the regulation of voluntary motion or activity. The occipital lobe is mostly in charge of vision, whereas the parietal lobe handles information concerning temperature, taste, touch, and movement.
What is in charge of voluntary motor activity?The motor cortex, a region of the brain situated behind the frontal lobe, controls these voluntary movements. A neural signal from the motor cortex travels from the brain stem, via the spinal cord, and into the neural network to the muscle being controlled.
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complementary proteins are 2 or more proteins that are combined so that the essential amino acids that are missing from one are provided by the other.
Due to the fact that when combined, grains and legumes provide all nine essential amino acids, grains and legumes are referred to as complementary proteins.
How do contrasting proteins combine?All the required amino acids can be adequately supplied by combining two or more foods with incomplete proteins to create complementary proteins. As long as you obtain enough of each protein during the day's meals, complementary proteins don't have to be consumed together.
What proteins are regarded as complimentary proteins?Due to the fact that when combined, grains and legumes provide all nine essential amino acids, grains and legumes are referred to as complementary proteins. Because they include tryptophan, methionine, and cysteine, nuts and seeds are a good complement to legumes.
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