The type of mutations, positive, negative or neutral, which are most likely to be seen in offspring several generations after the mutation occurred, are neutral mutations.
A neutral mutation is a type of genetic mutation that occurs when there is a slight alteration or shift in the genetic code of an organism that does not affect the phenotype or survival of that organism or its offspring. Neutral mutations can, however, accumulate over time, providing evolutionary raw material for later adaptation or speciation events. Neutral mutations are more likely to be passed down to the next generation because there is no selection pressure acting against them.
a. A single bacteria cell contains a positive mutation in its DNA: As bacteria reproduce by binary fission, the positive mutation is highly likely to be passed on to the offspring .b. A skin cell on a cat contains a positive mutation in its DNA: The positive mutation is unlikely to be passed on to the offspring because skin cells are not involved in reproduction. Only mutations that occur in cells that form eggs or sperm are likely to be passed down. c. A sperm cell in a whale contains a positive mutation in its DNA: As sperm cells are involved in reproduction, the positive mutation is highly likely to be passed on to the offspring.
However, Neutral mutations are more likely to be passed down to the next generation because there is no selection pressure acting against them.
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What is the process of decrease in any vessel diameter?
A decrease in the diameter of any vessel may occur due to a number of factors, including stress, anxiety, cold, certain medications, or other medical conditions.
Vasodilation and vasoconstriction are two processes that help to change the diameter of blood vessels.
Vasoconstriction is the process by which the diameter of a blood vessel is decreased. It can occur in response to various stimuli, such as stress or a decrease in blood pressure. Vasoconstriction can be caused by many factors, including nerve signals, hormones, and local chemical signals.
Vasoconstriction is caused by smooth muscle contraction in the walls of blood vessels. This leads to a decrease in the size of the blood vessel lumen, which in turn reduces blood flow through the vessel. Vasodilation, on the other hand, is the process by which the diameter of a blood vessel is increased.
It occurs when the smooth muscle in the walls of the blood vessel relaxes, causing the lumen to widen. This increase in diameter leads to an increase in blood flow through the vessel.
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which parts of a cell have a function in the production and release of an enzyme
Answer:
Lysosome
Explanation:
A lysosome is a membrane-bound cell organellethat contains digestive enzymes.
Lysosome are involved with various cell processes
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Which structure in the plant produces pollen for plant reproduction? O anther ovary O stigma O style
Stamen: The portion of a flower that produces pollen and typically has a thin filament supporting an anther.
An anther releases pollen (male reproductive cells). The anther is supported by the filament. A tube that develops down a style and into the ovary after pollen contacts the stigma during fertilisation. The ovule is fertilised by male reproductive cells that go down the tube and combine with it. Pollen, which like inconsequential yellow dust, contains the male sex cells of a plant and is an essential component of the reproductive cycle. Wildflowers can reproduce & produce enough seeds during dispersal and propagation with sufficient pollination. keep a population's genetic diversity high.
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in a photosystem, the ____ complex captures light energy and passes it to the ____ center where electrons are transferred out of the system.
In a photosystem, the light-harvesting complex captures light energy and passes it to the reaction center where electrons are transferred out of the system.
Photosystems are structures located in the thylakoid membranes of plants' chloroplasts, which are responsible for the initial stages of photosynthesis. Photosystems consist of pigments such as chlorophyll, as well as associated proteins that facilitate light energy capture and electron transfer.
During photosynthesis, there are two main photosystems, Photosystem I (PSI) and Photosystem II (PSII). These photosystems work together to convert light energy into chemical energy through a series of redox reactions.
Light energy is first absorbed by the pigments in the light-harvesting complex, which then transfers the energy to the reaction center where it is used to excite an electron to a higher energy state. This excited electron is then passed through a series of electron carriers, releasing energy as it goes, until it eventually reaches a terminal electron acceptor where it is used to reduce another molecule (usually NADP+) to NADPH.
This process is called electron transfer, and it is a critical step in the production of ATP and NADPH during photosynthesis.
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A plant asset can be defined by which of the following statements? (Check all that apply.) It is a tangible long-term asset. Its original cost (minus any salvage value) is expensed over its useful life. Its original cost is expensed in the period in which it was purchased. It is reported on the balance sheet. It has a life within the business greater than one period.
A plant asset can be defined by the following statements: "It is a tangible long-term asset. Its original cost is expensed in the period in which it was purchased. It is reported on the balance sheet. It has a life within the business greater than one period." Thus, the correct options are A, C, D, and E.
What is a plant asset?A plant asset is a tangible long-term asset that is used to produce or distribute goods and services. Examples of plant assets include land, buildings, machinery, equipment, vehicles, furniture, and fixtures. According to the question above, a plant asset can be defined by the following statements: It is a tangible long-term asset. Its original cost (minus any salvage value) is expensed over its useful life. It is reported on the balance sheet. It has a life within the business greater than one period.
These statements are all correct regarding the definition of a plant asset. Therefore, the correct options are A, C, D, and E (It is a tangible long-term asset, Its original cost is expensed in the period in which it was purchased, It is reported on the balance sheet, and It has a life within the business greater than one period).
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What happens to the particles of a substance when it condenses?
a. Particles stick together and stop moving.
b. Particles speed up and spread out.
c. Particles slow down and clump together.
d. Particles vibrate as they stick together.
When a substance condenses, the particles slow down and clump together. This is because condensation occurs when a gas or vapor cools and loses energy, causing the particles to slow down and lose their kinetic energy. The correct option is C .
As a result, the particles move closer together and begin to clump together to form a liquid or a solid state. Option c. Particles slow down and clump together is the correct answer. Option a. Particles stick together and stop moving is not entirely accurate because the particles still have some movement due to their thermal energy. Option b. Particles speed up and spread out and option d. Particles vibrate as they stick together are incorrect because they describe the opposite processes, evaporation and melting, respectively.
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The second order of chromatin packing occurs when nucleosomes coil together to form a fiber that is 300 nm in diameter.
T or F
What is part of the mucosa-associated lymphatic tissue?
Immune responses are started in response to particular antigens found on all mucosal surfaces by the mucosa-associated lymphoid tissue (MALT).
MALT inductive sites are secondary immune tissues where antigen sampling takes place and immune responses are triggered. The mucosa-associated lymphoid tissue (MALT) is a diffuse system of tiny concentrations of lymphoid tissue present in numerous submucosal membrane regions of the body, including the gastrointestinal tract, nasopharynx, thyroid, breast, lung, salivary glands, eye, and skin.
MALT is home to lymphocytes like T and B cells, plasma cells, and macrophages, all of which are positioned to interact with antigens moving through the mucosal epithelium. M-cells, which take antigen from the lumen and transmit it to the lymphoid tissue, are also present in intestinal MALT.
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bundles of myelinated axons form nervous system tissue called
Answer:
White Matter
Explanation:
The Nervous System is the system of nerves and nerve centers in an animal or human, including the brain, spinal cord, nerves, and ganglia.
White matter is nerve tissue, especially of the brain and spinal cord, which primarily contains myelinated fibers and is nearly white in color.
Which of the following is an individual factor that impacts levels of political behavior in an organization? A. Allocation of resources. B. Unclear performance
Neither of options A or B is an individual factor that impacts levels of political behavior in an organization.
An individual factor is something that is specific to an individual employee and affects their behavior within an organization. Examples of individual factors that can impact levels of political behavior in an organization include:
Personal ambitionPerceived self-interestNeed for power or influenceJob dissatisfactionLow trust in managementFear of job loss or insecurityPersonality traits such as narcissism or MachiavellianismThese individual factors can drive employees to engage in political behavior, such as building alliances, manipulating information, or engaging in favoritism, to advance their own interests within the organization.
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Obligate anaerobes which are sensitive to O2 would be found growing
a) only at the bottom of a tube of thioglycolate broth
b) approximately one-third of the way down the thioglycolate broth
c) throughout a tube of thioglycolate broth
d) only at the very top of a tube of thioglycolate broth
b) approximately one-third of the way down the thioglycolate broth
Obligate anaerobes are microorganisms that require an oxygen-free environment to survive and grow.
They cannot tolerate the presence of oxygen and can be killed by exposure to it. Thioglycolate broth is a type of differential medium that is commonly used to culture microorganisms based on their oxygen requirements.
Thioglycolate broth contains a reducing agent, such as thioglycolate, that removes oxygen from the medium and creates an anaerobic environment. It also contains a pH indicator that changes color depending on the oxygen concentration in the medium.
In thioglycolate broth, obligate anaerobes that are sensitive to oxygen would be found growing only at the bottom of the tube. This is because oxygen is consumed by facultative anaerobes and aerobes in the upper layers of the broth, creating a gradient of oxygen concentration. As obligate anaerobes cannot grow in the presence of oxygen, they are restricted to the bottom of the tube, where the oxygen concentration is lowest.
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can you have intercourse while using boric acid suppositories
Can boric acid suppositories be used during sexual activity without any adverse effects on either partner's health or the effectiveness of the suppositories?
It is not recommended to use boric acid suppositories during sexual activity due to the risk of irritation, discomfort, and infection.
Boric corrosive suppositories are not intended to be utilized during sexual action. The utilization of boric corrosive suppositories during sexual movement might cause vaginal bothering, distress, and increment the gamble of contamination or other unfriendly impacts. It is prescribed to keep away from sexual movement while utilizing boric corrosive suppositories, and to stand by something like 24 hours after the last portion prior to taking part in sexual action. It is essential to talk with a medical services supplier prior to utilizing boric corrosive suppositories to guarantee that they are suitable for your particular requirements and that you are utilizing them accurately. Your medical care supplier can likewise give direction on when it is protected to continue sexual movement subsequent to utilizing boric corrosive suppositories and can address any different kinds of feedback you might have.
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What is the pressure in the arteries at the peak of ventricular contraction?
The pressure in the arteries at the peak of ventricular contraction is called systolic pressure. At the peak of ventricular contraction, the pressure in the arteries is typically around 120mmHg.
What is blood pressure?Blood pressure refers to the amount of force or pressure that blood exerts on the walls of the arteries as it flows through them. It is measured in millimetres of mercury (mm Hg) and is expressed as two numbers: systolic and diastolic.
Systolic blood pressure: The force of blood against the artery walls when the heart contracts or beats is called systolic pressure. Diastolic blood pressure: The force of blood against the artery walls when the heart relaxes between beats is called diastolic pressure.
At the peak of ventricular contraction, the pressure in the arteries is called systolic pressure. It is the highest pressure that is exerted on the artery walls when the heart beats or contracts. This pressure is also known as the top or first number of the blood pressure reading.
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Let chatelier's principle applies to gas exchange
Le Chatelier's principle states that when a system at equilibrium is subjected to a stress, the system will adjust itself in order to counteract the stress.
This principle can be applied to gas exchange, which is the process of swapping feasts between two bodies. When a body is exposed to a drop in pressure, the body will acclimate itself in order to offset the drop in pressure. This can be seen when a diver swims to a lesser depth, where the pressure is lesser.
The diver's lungs will acclimate to the lesser pressure by dwindling the volume of the lungs, therefore allowing the diver to take in further oxygen. also, when a diver swims to a lower depth, the pressure decreases, and the lungs will acclimate by adding the volume to offset the drop in pressure.
Question is incomplete the complete question is
What does Le chatelier's principle applies to gas exchange?
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describe the pathophysiology of inspiration and expiration. how do these processes provide the body with oxygen?
When the diaphragm and the external intercostal muscles contract, inspiration occurs. When the diaphragm and intercostal muscles relax, exhalation occurs.
Muscles involved in inspiration ?The respiratory muscles are divided into three functional groups: the diaphragm, the rib cage muscles, and the abdominal muscles. Each group acts on the chest wall and its compartments, which include the lung-apposed rib cage, diaphragm-apposed rib cage, and abdomen.
Muscles involved in Expiration ?The rib cage muscles, which include the intercostals, parasternals, scalene, and neck muscles, primarily act on the upper part of the rib cage (pulmonary rib cage) and are both inspiratory and expiratory in nature. Expiratory abdominal muscles act on the abdomen and abdominal rib cage.
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what nerves that cross each other on the underside of the brain?
The corpus callosum connects the two sides of the brain at the bottom. The corpus callosum transmits messages from one side of the brain to the other by connecting the two halves of the brain.
On the underside of the brain, within the skull, are the cranial nerves. They begin in the brain's nuclei and travel in various directions to assist in controlling your senses and movement.
The majority of the central nervous system's sensory and motor pathways cross the midline. Species-by-species comparisons of various neuronal pathways suggest that the crossing of fibers is most likely a response to the evolution of distinct body parts.
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in a peptide bond, which parts of the two amino acids are joined together?
after a ewe has her lamb how long does the lamb only drink milk
The majority of the nutrients a lamb needs are met by ewe's milk up until about 30 to 45 days of age.
How long do lambs consume milk with their mother?Although 12 to 14 weeks after the commencement of lambing is the optimum weaning age, lambs can be weaned at 8 to 10 weeks or even sooner with the right feeding and management. It will be considerably simpler to transition lambs to a ration if they are trained prior to weaning (imprint feeding).
How long do lambs drink after birth?During 30 to 60 minutes after birth, lamb should receive enough colostrum. The ewe teats should be peeled to get rid of the wax plugs that frequently clog the teat in order to aid ensure this.
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you discover a new drug that blocks the movement of all substances through the nuclear pores of the nucleus. would your drug affect the copying of dna into mrna, translation of the mrna into a protein, or both? briefly explain your answer.
If a new drug is discovered that blocks the movement of all substances through the nuclear pores of the nucleus, then it would affect both the copying of DNA into mRNA and translation of the mRNA into a protein.
The nuclear pores present on the nuclear membrane allow the movement of substances in and out of the nucleus. The copying of DNA into mRNA and translation of mRNA into a protein both require the movement of substances through these nuclear pores. Since the new drug blocks the movement of all substances through these pores, both the processes will be affected.
A brief explanation:
DNA is present in the nucleus and RNA polymerase enzyme, which is involved in the transcription process, also enters the nucleus. The RNA molecule produced from the transcription process must exit the nucleus and enter the cytoplasm to be translated into proteins. Hence, the nuclear pores play an essential role in the movement of the RNA molecule from the nucleus to the cytoplasm. As a result, both the copying of DNA into mRNA and translation of mRNA into a protein are affected when the movement of substances through these nuclear pores is blocked.
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starting from the concept of a gene pool, explain briefly how populations of early vertebrates could have evolved into different groups (3)
- gene pool is all genes
- geographic isolation
- speciation if populations are reproductively isolated
- in different environments there are different selection pressures
- allele frequencies change
Starting from the concept of a gene pool, the populations of early vertebrates could have evolved into different groups that are gene pool is all genes, geographic isolation, and in different environments there are different selection pressures.
The concept of a gene pool is crucial in understanding how early vertebrate populations could have evolved into various groups. A gene pool refers to all the genes found in a population, including various alleles. The term "allele" refers to the alternative versions of genes that exist. Different groups of early vertebrates could have evolved via different selection pressures and geographic isolation. Let's have a brief look at how populations of early vertebrates could have evolved into different groups by examining the role of a gene pool:The geographic isolation of populations of early vertebrates is one factor that could cause them to evolve into different groups.
Populations separated by geographical barriers such as mountains or water may be unable to reproduce with one another, leading to the formation of different species (speciation) if populations are reproductively isolated. In different environments, there are different selection pressures. Certain alleles may be more advantageous in one environment than in another. As a result, allele frequencies in populations may change, resulting in populations evolving different traits and eventually leading to the formation of different species. In a nutshell, the gene pool, geographic isolation, and different selection pressures in various environments are all important factors in explaining how populations of early vertebrates could have evolved into different groups.
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Can someone help with this??
Answer: patterns and evolutionary
The tails of animals can serve many important functions. They are mainly used in balance and locomotion. Many lizards have a fragile, detachable tail that will come off when they are attacked by predators, allowing them to escape.
Why is the presence of a brightly colored, detachable tail an advantage for some lizards?
It helps them blend into their natural environments.
They are more likely to attract mates.
Predators are more likely to grab them by the tail.
Predators are likely to be frightened away by a brightly colored tail.
The presence of a brightly colored, detachable tail an advantage for some lizards, as it helps them blend into their natural environments and hide from predators and even if they get caught the tails of lizard are detachable.
lizards with colorful tails are more likely to attract mates easily
As in reptiles, the Predators are more likely to grab them by the tail, the presence of colorful tail is likely to be frightened away by a brightly colored tail.
Therefore, when a lizard encounters a natural enemy, the lizard’s reaction is usually one of distraction and flight and they can deal with potential predators.
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What are the two divisions of the skeletal system?
There are two divisions of the skeletal system, these are: axial skeleton and appendicular skeleton.
The axial skeleton is the central region of the body. It consists of altogether 80 bones. The parts covered by the axial skeletal system are skull (cranial and facial bones), ears, neck, back (vertebrae, sacrum and tailbone) and ribcage.
The appendicular skeletal system forms the upper and lower extremities. These are bones of the pectoral limbs, i.e., arm, forearm, and hand, bones of pelvic limbs i.e., thigh, leg and foot, pectoral girdle, and the pelvic girdle. There are a total of 126 bones. The appendicular skeleton is not fused which is not like the axial skeleton.
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1. What is the gas taken in by the microorganisms? O2. 2. What is the gas given off by the microorganisms?
The gas taken in by the microorganisms is Oxygen (O2). The gas given off by the microorganisms is Carbon Dioxide (CO2).
The gas given off by the microorganisms is carbon dioxide (CO2).Microorganisms take in oxygen through a process known as respiration, where they convert glucose into energy.
During this process, they require oxygen as the final electron acceptor. On the other hand, microorganisms release carbon dioxide into the atmosphere during respiration.
The process of releasing carbon dioxide is known as the Krebs cycle, which is part of cellular respiration.In summary, microorganisms take in oxygen and release carbon dioxide during respiration.
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which region of the nephron is adapted for reabsorption, as seen in its length and prominent microvilli? a) proximal convoluted tubule b) distal convoluted tubule c) nephron loop d) collecting duct
The proximal convoluted tubule (PCT) is the region of the nephron that is most adapted for reabsorption.
It is a highly coiled and convoluted tube located in the renal cortex and is the first segment of the renal tubule after the Bowman's capsule. The PCT is lined with a single layer of cuboidal epithelial cells that have a prominent brush border composed of microvilli, which greatly increase their surface area for absorption.
The PCT reabsorbs approximately 65% of the filtered water and solutes, including glucose, amino acids, ions, and most of the filtered sodium, chloride, and bicarbonate ions. The reabsorption is accomplished through various transport mechanisms, including diffusion, facilitated diffusion, active transport, and cotransport. This process allows the body to retain necessary nutrients and ions while excreting waste products.
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In the energy pathway called lactic acid fermentation, ______ is reduced to lactic acid, and NADH is oxidized to NAD+, which allows ______ to continue producing a small amount of ATP.
In the energy pathway called lactic acid fermentation, pyruvic acid is reduced to lactic acid, and NADH is oxidized to NAD+, which allows glycolysis to continue producing a small amount of ATP.
What is Lactic Acid Fermentation?
Lactic acid fermentation is a metabolic process in which glucose or other monosaccharides are converted into cellular energy and lactate. It is an anaerobic fermentation that occurs in some bacteria and animal cells. In the presence of oxygen, pyruvate generated by glycolysis is oxidized to produce ATP via the process of aerobic respiration. Pyruvate is transformed into acetyl-CoA by the pyruvate dehydrogenase complex, which is used to fuel the citric acid cycle.
However, in anaerobic circumstances, such as in the absence of oxygen, glycolysis is the only metabolic pathway available to release energy from glucose. Lactic acid fermentation begins when glycolysis generates pyruvate in this situation.
The enzyme lactate dehydrogenase catalyzes the conversion of pyruvate to lactate during lactic acid fermentation. This reaction also oxidizes NADH to NAD+, allowing glycolysis to continue and produce a small amount of ATP. It produces lactate, which is responsible for muscle fatigue during intense physical activity, in animals.
Lactic acid fermentation is also employed in the production of yogurt, cheese, sauerkraut, and kimchi.
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Which of the following molecules is the lowest-energy donor of electrons to the electron transport chain?
A. NADH
B. water
C. FADH2
D. ATP
The molecule that is the lowest-energy donor of electrons to the electron transport chain is FADH2.
What is the electron transport chain? The electron transport chain (ETC) is a sequence of electron carriers in the inner mitochondrial membrane that facilitate the generation of ATP via oxidative phosphorylation. The final electron acceptor in the electron transport chain is oxygen.
NADH and FADH2 are important electron donors to the electron transport chain. They donate electrons to complex I (NADH) and complex II (FADH2), respectively, which then transfer them through the electron transport chain to complex IV, where oxygen is the final electron acceptor.
The energy produced by electron transfer is used to pump protons across the inner mitochondrial membrane, forming a proton gradient that drives ATP synthesis via ATP synthase. Therefore, NADH and FADH2 are important contributors to ATP synthesis via oxidative phosphorylation.
What is FADH2? FADH2 is a type of reduced flavin adenine dinucleotide (FAD), a cofactor involved in redox reactions in cells. FADH2 is created when FAD accepts two electrons and two protons. FADH2 is a substrate for succinate dehydrogenase (complex II) in the electron transport chain, where it donates electrons to the chain via its flavin group.
Since the reduction potential of FADH2 is lower than that of NADH, fewer protons are pumped across the mitochondrial membrane when FADH2 donates electrons to the chain. Therefore, NADH donates more energy to the electron transport chain than FADH2 does.
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describe a postganglionic neuron. multiple choice question. they are unmyelinated and extend from the target cell to the cerebrum. they are myelinated and extend from the anterior horn to the target cells. they are unmyelinated and extend from the autonomic ganglion to the target cells. they are myelinated and extend from the autonomic ganglion to the target cells.
The postganglionic neuron is an unmyelinated neuron that extends from the autonomic ganglion to the target cell. Therefore, the correct description is they are unmyelinated and extend from the autonomic ganglion to the target cells.
What is a postganglionic neuron?The postganglionic neuron is an autonomic neuron that extends from the autonomic ganglion to the target cell. It is an unmyelinated neuron that is responsible for transmitting information from the ganglion to the target cell in the peripheral nervous system. It differs from preganglionic neurons, which transmit information from the central nervous system to the autonomic ganglion.
Therefore, it is correct to say that postganglionic neurons are unmyelinated and extend from the autonomic ganglion to the target cells. Myelination is not present in postganglionic neurons.
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Which idea of evolution is supported by the existence of vestigial structures? O heredity of traits differential reproductive success O increased genetic variation O descent with modification
2.06
Vestigial structures are features of an organism that have lost their original function during the course of evolution. They are remnants of structures that were functional in an ancestral species but are no longer needed.
What is a species ?A species is a basic unit of biological classification that refers to a group of organisms that share similar characteristics and can interbreed to produce viable, fertile offspring. In other words, members of the same species can mate and produce offspring that are capable of reproducing themselves.
The concept of a species is important in biology because it is the fundamental unit of biodiversity. It is used to categorize and understand the diversity of life on Earth. There are many different ways to define a species, but the most widely accepted definition is the Biological Species Concept, which defines a species as a group of organisms that can interbreed and produce viable, fertile offspring, but are reproductively isolated from other groups.
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Which of the following individuals used X-ray diffraction to determine that DNA was helical, the distance between base pairs, the length of one turn of the DNA helix, and the diameter of DNA?Select one or more:Watson Franklin Crick Avery MacLeod Griffeths Chargaff McCarty Wilkins
The individual who used X-ray diffraction to determine that DNA was helical, the distance between base pairs, the length of one turn of the DNA helix, and the diameter of DNA was Rosalind Franklin. Therefore, the correct answer is Franklin.
Rosalind Elsie Franklin was an English scientist who contributed greatly to the understanding of molecular structures and is best known for her work on X-ray diffraction images of DNA, leading to the discovery of DNA's double helix structure. Franklin's work on DNA was published in the same issue of Nature as Watson and Crick's paper describing the double helix. Despite being the first to create a clear image of the structure of DNA, Franklin was not recognized for her work during her lifetime.
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