The visceral mass that every mollusk has is a centralized region of the body in which all the organs are located which is therefore denoted as option A.
What is a Mollusk?This is referred to as a tiny soft-bodied invertebrate of the phylum Mollusca, which is usually wholly or partly enclosed in a calcium carbonate as it acts as the shell.
It also contains a holds the bulk of the digestive, reproductive, excretory, and respiratory systems. and some parts comprises of the mantle, or pallial, cavity.
Examples of these types of organisms are snails, slugs etc and is therefore the reason why the visceral mass which contains different types of organs needed for its daily activities was chosen as the correct choice.
Read more about Mollusks here https://brainly.com/question/1027471
#SPJ1
external features used to classify plants
External features that used to classify plants :-
1.Leaf shape and arrangement: Leaves can be classified based on their shape, such as being oblong, elliptical, or lobed, as well as how they are arranged on the stem, such as being alternate or opposite.
2.Flower structure and color: The shape and color of flowers are used to classify plants. For example, some plants have large, showy flowers with bright colors, while others have small, inconspicuous flowers.
3.Stem characteristics: The shape and texture of a plant's stem can also be used to classify it. Some plants have woody stems, while others have herbaceous (non-woody) stems.
4.Fruit and seed characteristics: The size, shape, and color of a plant's fruit and seeds can be used to classify it. Some plants have large, fleshy fruits, while others have small, dry seeds.
5.Bark characteristics: Trees can be classified based on their bark. Some have rough, scaly bark while others have smooth, shiny bark.
6.Root system: Some plants have deep roots, while others have shallow roots. This is a useful characteristic in identifying certain types of plants.
7.Habitat: Some plants are aquatic while others are terrestrial and this is a valuable trait in identifying them.
8.Size and form: Some plants are shrubs, others are trees, and others are herbaceous, this feature also helps in identifying them.
Complete question:-
What are the external features that used to classify plants?
To learn more about classification of plants:-
https://brainly.com/question/15250197
What happens when genetic diversity decreases?
Species can go extinct and be lost forever when genetic diversity decreases.
This is a result of despair brought on by inbreeding paired with a lack of ability to adjust to change. New alleles can be introduced in these situations to save the population. For a population to adapt to changing circumstances, genetic diversity is essential.
Genetic drift is a result of sampling error because individuals are randomly chosen when a population is sampled. A random selection is one in which each member of the population has an equal chance of being chosen.
The variety of various inherited features within a species is referred to as genetic diversity. There would be many people with a wide range of diverse traits in a species with significant genetic diversity. For a population to adapt to changing surroundings, genetic variety is essential.
To learn more about Genetic diversity :
https://brainly.com/question/14926046
#SPJ4
What happens to green light when it hits a plant leaf?
Explanation:
When light strikes a leaf, it can be absorbed by, reflected from or transmitted through the leaf. Plants appear green because they reflect and transmit slightly more green light than they do blue or red light. Chlorophyll also absorbs green light poorly. For these reasons, green light is sometimes stated as not being useful to plants for photosynthesis. However, green light is still moderately effective since other pigments absorb the light and make it useful for photosynthesis. A more correct statement is that, generally, green light is less efficient at stimulating photosynthesis than blue or red light. In some situations, the greater reflection and transmittance of green light by leaves can be desirable. Green light can better penetrate a plant canopy and thus reach lower leaves. This can, in theory at least, reduce lower-leaf loss. However, few LED arrays contain green LEDs because they are less efficient than blue and red LEDs from both an electrical and plant response perspective.
You’ve learned about the laws of thermodynamics. using examples, explain why the first and second laws are significant for living organisms.
The first law of thermodynamics in living things. The sun provides the energy for photosynthesis. Plant leaves have cells that take in light energy and transform it into chemical energy.
The second law states that when everything goes from order to disorder, entropy increases. Living organisms die when there is a systemic imbalance.
Glucose, which is needed to create the complex carbohydrates required to increase plant bulk, serves as a reservoir for the chemical energy.
The second law of thermodynamics has two statements: Clausius's claim A system that operates in a cycle and transfers heat from a low-temperature reservoir (or object) to a high-temperature reservoir (or object) without causing any outside influences or interacting with the environment is not conceivable to build.
To know more about thermodynamics
https://brainly.com/question/29359194
#SPJ4
Suppose you want to produce a plant cultivar that has red flowers and speckled leaves. You have 2 cultivars, each having 1 of the desired traits. How would you proceed?
In desired traits, by breeding these two types of plants we will get a hybrid plant with the desired traits: red flowers and speckled leaves.
What do you mean by traits?A trait is a specific characteristic of an individual. Traits can be determined by genes, environmental factors or by a combination of both. Traits can be qualitative or quantitative.
Genes carry the information that determines your traits (say: trates), which are features or characteristics that are passed on to you — or inherited — from your parents. Each cell in the human body contains about 25,000 to 35,000 genes.
Biological traits describe species' physiology, morphology, life history, and behavior, capturing both inter-specific interactions and the connections between species and their environment.
Learn more about traits:
https://brainly.com/question/1463051
#SPJ1
Write the balanced chemical equation for cellular respiration. (Please write the equation using scientific chemical symbols and then explain the equation in writing beneath.)
The complete balanced chemical equation for cellular respiration is as follows:
C6H12O6 (s) + 6 O2(g) ------> 6 CO2(g) + 6 H2O(l) + ATP
Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are through- merchandise and ATP is strength this is converted from the procedure. Cellular breathing is the procedure through which organisms use oxygen to interrupt down meals molecules to get chemical strength for mobile functions. Cellular breathing takes location withinside the cells of animals, plants, and fungi, and additionally in algae and different protists. Adenosine triphosphate (ATP) is the supply of strength to be used and garage on the mobile level. The shape of ATP is a nucleoside triphosphate, including a nitrogenous base (adenine), a ribose sugar, and 3 serially bonded phosphate groups.
To learn more about cellular respiration check the link below:
https://brainly.com/question/14158795
#SPJ4
Some bacteria form a capsule or slime layer around their cell wall in order to promote motility. Group of answer choices True or False
Some bacteria form a capsule or slime layer around their cell wall in order to promote motility is false ,
Biofilms are made up of many cells and their outer barriers. Both capsules and slime layers serve fundamental tasks of protection and adhesion.
Many bacterial cells produce extracellular material in the form of a slime layer or a capsule. A slime layer is loosely connected to the bacteria and readily washed away, but a capsule is securely linked to the bacterium and has defined limits.
High molecular weight compounds, glycoproteins and glycolipids, released in the cell and secreted outside the cell, produce capsules and slime layers. These two layers protect the cell from desiccation and provide resistance to macrophage phagocytosis.
Learn more about to bacteria
https://brainly.com/question/8008968
#SPJ4
What are the similarities and differences between genetic engineering and selective breeding?
Through genetic engineering, genes from one species can be introduced into another that is unrelated. The individuals involved in selective breeding must be of the same species.
In GMO, researchers combine new gene combinations. Genes come together on their own during selective breeding. By utilizing pollen from one strain to fertilize another strain and therefore "cross" the gene pools, for instance, selective breeding can change a species' genetic makeup naturally.
The chromosomes are altered intentionally through genetic engineering—a technique that is against nature. For instance, a crop may contain a gene from a cold-water fish to prevent freezing during the winter. This wouldn't happen in the wild.
Learn more about breeding Visit: brainly.com/question/13614055
#SPJ4
Why do cells need to have a high surface area relative to their total volume?
Smaller single-celled creatures have a high surface area to volume ratio, which enables them to rely on waste removal and oxygen diffusion to thrive. This method can be more successful if the objects have a larger surface area to volume ratio.
What is high surface area?Material with a large surface area acts as an active species' support or catalyst. Precipitation, sol-gel, or flame methods are frequently used to synthesize them. A flexible option is "exotemplating," which uses porous carbon matrices as a hard template, for example.
What is carbon with a high surface area?NaOH at a temperature of 7000C produces activated carbon with a large surface area of around 2400 m2/g . But only irregular materials and irregular intercalation processes may be activated by NaOH [21]. Activated carbon used for this investigation, however, must have a high porosity level.
Learn more about high surface area to visit link
https://brainly.com/question/13431835
#SPJ4
Which set of conditions would most likely cause a change in gene frequency in a population that reproduces sexually
Small population size is most likely to result in changes in allele frequencies in a population. So, the correct option is (B).
The relative frequency of an allele (gene variant) at a specific locus in a population, expressed as a fraction or percentage, is known as allele frequency or gene frequency. It is the proportion of all chromosomes in the population that carry that allele divided by the entire population or sample size. Microevolution is the change in allele frequencies that happens within a population over time.
Given the given facts:
A specific location on a chromosome and a specific allele at that siteA population of N people with ploidy n, which means that each person has n copies of each chromosome in their somatic cells (e.g. two chromosomes in the cells of diploid species)In the population, the allele is found on I chromosomes.Learn more about gene frequency to visit this link
https://brainly.com/question/13798929
#SPJ4
Full Question: Which set of conditions would most likely cause a change in gene frequency in a population that reproduces sexually A. random mating. B. Small population size. C. No migration into or out of a population. D. Absence of natural selection
Is this correct? and can you explain why its not incorrect or correct?
Answer:
Yes,Good Bro no it's a joke you re bad
Which of the following groups of algae is notable for having members with silica cell walls?
a) Phaeophyta b) Chlorophyta c) Chrysophyta d) Rhodophyta
Algae in the following categories are distinguished for possessing silica cell walls. Correct Response Cryophyte.
What distinguishes Cryophyte?The Chrysophyceae and Synurophyceae groups of flagellates, which make up the majority of the cryophytes, are distinguished for their central and peripheral nervous systems flagella, yellow enhanced version, and silicified endogenous resting phases (stomatocysts). About 1200 species have been described in their entirety.
Why are chrysophytes referred regarded as diatoms?Diatoms are a form of photosynthesizing phytoplankton that are almost ubiquitous in wet environments, such as soils, freshwater pools of water, and seas. Cryophytes used to refer to all types of cellular brown algae in addition to diatoms. Diatoms are present in every terrestrial and aquatic habitat.
To know more about Cryophyte visit:
https://brainly.com/question/15408319
#SPJ4
Darron lost his sense of taste because a tumor caused damage to a structure located on top of his brainstem. This structure is known as the
The structure located on top of Darron's brainstem that caused him to lose his sense of taste is called the nucleus of the solitary tract (NTS).
The NTS is part of the autonomic nervous system and is responsible for relaying taste information from the tongue to the brain. The NTS is also involved in the control of breathing, blood pressure, and other bodily functions. In Darron’s case, a tumor in the vicinity of the NTS caused damage to the nerve cells in the area, resulting in a disruption of the signals that travel from the tongue to the brain. This has led to a complete loss of his sense of taste.
Although the tumor is the cause of Darron’s loss of taste, it is the damage to the NTS that is responsible for the symptom. The NTS is located in the medulla oblongata, which is a major part of the brainstem and is responsible for controlling many of the body’s involuntary functions.
The NTS is a cluster of neurons that receive taste information from the tongue, and then relay it to the brain. When the cells of the NTS are damaged, the signals that travel from the tongue to the brain are disrupted, resulting in a complete loss of taste.
To learn more about nervous system visit:
https://brainly.com/question/13487019
#SPJ4
Before testing the pea plants, Mendel formed a five-part hypothesis. What did Mendel include in his hypothesis
The following are included in Mendel's theory: A pair of components regulate traits (known as genes). One gene is inherited from each parent for each trait. Every quality is passed down from one generation to the next.
During the development of gametes, genes divide. When two genes are in direct opposition to one another, one gene may be expressed while the other is hidden.
A trait may not manifest in an individual but can still be passed on to the next generation, and the genes for each trait separate themselves during gamete formation. Individuals inherit one such unit for each feature from each parent.
Learn more about to Mendel
https://brainly.com/question/11343026
#SPJ4
female gains in body fat starting around puberty can result in a cycle of diminished physical fitness. please select the best answer from the choices provided. True or False
Female gains in body fat starting around puberty can result in a cycle of diminished physical fitness.The answer is true.
Some moments in a woman's life are to be watched more closely. The first of them is puberty.
It is known that the onset of overweight in children and adolescents predisposes, with high probability, to the development of obesity in adulthood. We will strive to monitor more particularly young girls quickly pubescent (early puberty), who grow a little too much.
Anyway, to keep a nice silhouette, prefer exercise. Did you know, the parameter most correlated with the increase in the frequency of obesity in the United States is not the diet but the number of trips by car.
To look more about puberty click here
brainly.com/question/28344870
#SPJ4
Answer the following questions.
1. Mitosis is categorized as a form of asexual reproduction.
2. Meiosis is categorized as a form of sexual reproduction.
3. Why are the offspring created by mitosis considered to be clones?
4. Are clones created during meiosis? (Explain your answer.)
5. What are gametes?
A gamete is a reproductive cell.
6. Human gametes should contain _____ chromosomes each. This number would be considered the ______________ (haploid/diploid) number for humans. The symbol for this is ______.
7. After fertilization, the fertilized egg is referred to as a _______________.
8. What type of cells have the ‘2n’ number of chromosomes?
9. What type of cells have the ‘n’ number of chromosomes? When do these cells have ‘2n’ chromosomes?
10. If an organism has an ‘n’ of 32, how many chromosomes are in its somatic cells? How many chromosomes are in its gametes?
Mitosis is a form of asexual reproduction in simple living organisms. The outcome of each cell cycle is two identical cells.
What do you mean by mitosis?Mitosis is a part of the cell cycle in which replicated chromosomes are separated into two new nuclei. Cell division by mitosis gives rise to genetically identical cells in which the total number of chromosomes is maintained.
Mitosis is a process where a single cell divides into two identical daughter cells. The characteristics of Mitosis are: During mitosis one cell divides once to form two identical cells.
The purpose of mitosis is to make more diploid cells. It works by copying each chromosome, and then separating the copies to different sides of the cell.
Learn more about mitosis:
https://brainly.com/question/29776367
#SPJ1
What are the 3 events in meiosis that contribute to genetic variation ?
Crossing over, Independent assortment, and Random fertilization are the three meiotic events that affect genetic variation.
Crossing over: A process known as crossing over occurs when homologous chromosomes couple up and exchange genetic material during prophase I. Genetic variety is the outcome of this, which causes the development of chromosomes with novel gene combinations.
Independent assortment: The chromosomes arrange at random along the cell equator during metaphase I. This indicates that there is an equal likelihood for each pair of homologous chromosomes to be found in either daughter cell. Genetic variety results from the varied chromosomal arrangements in each daughter cell as a result.
Random fertilization: During fertilization, sperm and egg cells combine to form a zygote. Since sperm and egg cells are produced through meiosis, each one carries a unique combination of chromosomes.
To learn more about genetic variation
https://brainly.com/question/848479
#SPJ4
How does the image of the dead bird wrapped in a silk cloth strengthen the feminist theme?
The bird represents Mrs. Wright's loneliness during her marriage to Mr. Wright.
Susan Glaspell's Trifles is a one-act drama. On August 8, 1916, the Provincetown Players staged it at the Wharf Theatre in Provincetown, Massachusetts. Glaspell portrayed Mrs. Hale in the original production. The drama is regularly anthologized in textbooks of American literature. The play, written during the first wave feminist movement, contrasts how women act in public and in private, as well as how they perform in front of other women vs males.
Through the absence of its main character, Mrs. Wright, Trifles addresses the issue of identity. Glaspell reveals how a person's identity is "just as much created as innate" by leaving this figure off stage. Mrs. Wright can only be perceived by the audience via the lens of the on-stage characters as they review and debate her personal life and alleged crime, and these characters may not all perceive Mrs. Wright in the same way. The spectator gets a well-rounded image of Mrs. Wright and how her identity is flexible and evolves based on the preconceptions of the other characters from the group in the farmhouse.
To learn more about Trifles, here
brainly.com/question/30125129
#SPJ4
What is most likely the reason for the change in fur color?
A change in your cat's coat color may indicate a skin infection or allergy. It's not a skin problem that causes the coat to change, but it's because cats wash themselves more often than usual.
Illness and stress, especially if chronic or prolonged, can affect the appearance of a cat's coat, especially its shine and texture, and many cats shed excessive coat when stressed.
Sunlight can also change the color of your cat's fur, which will wash it out and make it less tonal. As they age, black cats can become grayish and orange cats can become yellowish. Outdoor cats may get more sunlight, but even indoor cats need sunlight.
For more information on cats , visit :
https://brainly.com/question/22333643
#SPJ4
What are the factors that influence you to engage pre marital sex?
Teenagers may date outside of their parents' unions for a number of reasons, including as their self-perception, religious beliefs, financial status, media exposure, parental views, societal pressure, and cultural background.
Teenagers are more prone to turn to a sexual relationship for solace if they feel incomplete, inadequate, or underappreciated. However, those who lead happy lives, full of cherished family traditions, enjoyable pastimes, and, most importantly, unshakable love and acceptance, are less likely to act inappropriately during sexual encounters as a result of a preoccupation with fulfilment. Others who have a strong, increasing faith in God are more likely to have inherent tendencies to value and protect sex as a gift and to respect people rather than exploit them. Take note of these specific teen risk factors.
Learn more about primatial sex at
https://brainly.com/question/29795968?referrer=searchResults
#SPJ4
looking at model 1, the other molecules that appear to be high potential energy molecules (free energy carriers) during cellular respiration to carry electrons to oxidative phosphorylation are
The additional compounds that seem to be high potential energy molecules for transporting electrons to oxidative phosphorylation during cellular respiration include The majority of ATP molecules created during cellular respiration come from oxidative phosphorylation.
The process through which organisms combine oxygen and food molecules, direct the chemical energy of those components toward life-sustaining processes, and eliminate carbon dioxide and water as waste is known as cellular respiration.
The process of breaking down sugar in the presence of oxygen and releasing energy in the form of ATP is known as cell respiration, and it takes place in the mitochondria of living things (animals and plants). Water and carbon dioxide are emitted as waste during this procedure.
Through the mitochondrial electron transport chain, ATP production is connected to electron transfer and corresponding oxygen consumption through the process of oxidative phosphorylation.
For such more question on cellular respiration.
https://brainly.com/question/14158795
#SPJ4
Fill the boxes to describe how precpitation forms.
Rain, hail, and snow are the three most frequent kinds of precipitation. Water droplets that fall to the Earth's surface as precipitation are referred to as rain.
What is precipitation?Raindrops develop around minute cloud condensation nuclei, such as dust particles or pollutant molecules.
Any product of barometrically condensed water vapor falling to the ground is referred to as precipitation. Rain, sleet, snow, hail, and showers are among the main forms of precipitation.
Therefore, precipitation occurs when a section of the environment becomes submerged in water vapor, causing the water to collect and "precipitate".
Learn more about precipitation, here:
https://brainly.com/question/9235081
#SPJ1
What are the different layers that protect the brain and spinal cord? bone cerebrospinal fluid muscle meningeal layers
Bones and cerebrospinal fluid make up the layers that protect the brain and spinal cord. The brain is the body's primary processing organ. It either directly or indirectly controls how the body functions.
Along with the spinal cord, the brain is a component of the CNS. The brain is divided into three sections: the forebrain, the midbrain, and the hindbrain.
Bones: The skull and vertebral column bones form a hard protective shell around the brain and spinal cord.
The meninges are located directly beneath the skull and vertebral column bones. The meninges are three layers of connective tissue that surround and protect the brain and spinal cord.
Cerebrospinal fluid (CSF): Inside the brain and spinal cord is a watery cushion. The Blood Brain Barrier is a filtering barrier that protects neurons from toxins in the bloodstream.
To know more about spinal cord click here,
https://brainly.com/question/14594634
#SPJ4
The passage describes current research on the implications of histone methylation in plants.
Based on the information in the passage, what testable scientific question could be asked about the influence of chromosome structure on an organism's traits?
A.
How does histone methylation prevent organism growth and cell division during periods of heat stress?
B.
Is histone methylation the best way for plants to increase their expression of heat shock proteins?
C.
Will histone modifications permanently upregulate heat shock protein expression after heat stress exposure?
D.
Can histone modifications that prime a plant to survive heat stress be transmitted from parents to offspring?
Histones include a variety of basic residues that can be methylated, and the results of this methylation depend on the type of basic residue, where it is methylated, and where it is located.
What is Histone Methylation?Specific enzymes have the ability to add or remove methyl marks during the dynamic process of histone methylation. In order to influence phenotypic outcomes, other proteins can identify and bind methylated residues.
By way of DNA sequence, non-coding RNA, DNA methylation, or other post-translational signals on histone tails, histone-modifying enzymes might be attracted to particular loci.
In some cases, histone methylation can be passed down from parents to offspring and can be either dynamic or stable throughout a cell's life, including during mitosis and meiosis.
Therefore, Histones include a variety of basic residues that can be methylated, and the results of this methylation depend on the type of basic residue, where it is methylated, and where it is located.
To learn more about Histones, refer to the link:
https://brainly.com/question/13036208
#SPJ1
Why do you think a composer would want to alter or highlight a rhythm or a tone?
Answer: A composer may want to alter or highlight a rhythm or a tone to create a desired effect or mood. By emphasizing certain rhythms or tones, a composer can create a sense of urgency, tension, or excitement. Additionally, by altering the rhythm or tone, a composer can add texture or depth to a piece of music, making it more interesting and unique.
What must cells do as they reach the limit of their surface area to volume ratio?
As cells reach the limit of their surface area to volume ratio, they must employ certain strategies in order to survive and continue to grow.
The primary strategy that cells use to survive and continue to grow when they reach the limit of their surface area to volume ratio is to divide. Cell division is the process of one cell splitting into two identical daughter cells. This process is essential for cellular growth, as it allows the cell to divide its surface area and volume, thus lowering its surface area to volume ratio. This allows the daughter cells to exchange material with their environment more efficiently than the original cell did.
Another way that cells can increase their surface area to volume ratio is by forming protrusions from their surface. These protrusions, also known as microvilli, are small folds of the cell membrane that increase the cell’s total surface area. This allows the cell to exchange material with its environment more efficiently, and thus allow it to continue to grow.
Cells can also increase their surface area to volume ratio by forming internal structures known as vacuoles. Vacuoles are small, membrane-bound structures that are filled with various substances, including water and enzymes. These substances can help the cell exchange materials with its environment more efficiently, thus allowing it to continue to grow.
For more information on cells , visit :
https://brainly.com/question/30046049
#SPJ4
the formation of a cell plate is beginning acorss the middle of a cell and nuclie are reforminat at oppostie ends of the cell. What kind of cell is this
A plant cell undergoing cytokinesis is one that has a cell plate across the middle of its cell and nuclei developing at opposing ends of the cell.
So, The right answer is A; cytokinesis is the process by which a cell's cytoplasm divides into two, giving rise to two daughter cells.
The process of cytokinesis happens in both plant and animal cells, although in distinct ways. Plant cells have a cell plate in the centre, whereas animal cells have a cleavage furrow.
As a result, a plant cell that forms a cell plate across the middle of its cell and nuclei at opposing ends of the cell is experiencing cytokinesis.
Learn more about to cell
https://brainly.com/question/30046049
#SPJ4
Full Question ;
The formation of a cell plate is beginning across the middle of a cell and nuclei are re-forming at opposite ends of the cell. What kind of cell is this?
a. a plant cell undergoing cytokinesis
b. an animal cell in metaphase
c. an animal cell in telophase
d. a plant cell in metaphase
e. an animal cell undergoing cytokinesis
What 4 characteristics do all mollusks share?
Four common characteristics that all mollusks share , are having soft bodies, a mantle, a visceral mass, and the foot.
The phylum Mollusca has many distinctive features and special characteristics, which include a mantle cavity, visceral mass, foot, and radula. Mantle is the cavity which is used for breathing and excretion purpose , radula is longue like structure that helps in sensory and food grasping purpose. Mollusks also includes various classes like Gastropod, Bivalvia, Cephalopoda, and Polyplacophora .
Gastropods have a special characteristics that includes spirally-coiled external shell while others mollusks usually have a flattened shell, and many of them doesn't possess any shell as outer structure.
To learn more about Mollusks , here
brainly.com/question/28737614
#SPJ4
Which statement best describes the chemical relationship between glucose and cysteine?
(A.) Some of the carbon, oxygen, and hydrogen atoms in cysteine were once part of a glucose molecule.
(B.) All of the carbon-oxygen bonds in glucose become carbon-oxygen bonds in cysteine.
(C.) One of the oxygen atoms in glucose was transformed into a sulfur atom during the synthesis of cysteine.
Answer: Choice A
Explanation:
Which scientists labeled the DNA and proteins of viruses to demonstrate that DNA is the molecule of heredity
In 1953, James Watson and Francis Crick proposed the double helix model of DNA, which revolutionized the field of genetics. The discovery of the structure of DNA was a monumental achievement, it was important breakthrough in establishing DNA as the molecule of heredity.
In 1935, American microbiologist Wendell Stanley demonstrated that a virus is composed of proteins and nucleic acids, proving that viruses are complex, living organisms. Stanley also identified and labeled the proteins and nucleic acids of the virus he was studying, which allowed him to conclude that the nucleus of this virus was composed of DNA. This was the first time that a scientist had identified and labeled the DNA and proteins of a virus, and it demonstrated that DNA is the molecule of heredity.
In the 1940s, American virologist Alfred Hershey and Canadian biologist Martha Chase conducted a series of experiments to study the composition of viruses. They used a radioactive isotope of phosphorus to label the proteins of a virus, and a radioactive isotope of sulfur to label the DNA. By doing this, they were able to prove that the DNA of the virus was the molecule responsible for heredity. This was the first time that scientists had labeled the DNA and proteins of a virus to demonstrate that DNA is the molecule of heredity.
Learn more about double helix model at :https://brainly.com/question/2920404
#SPJ4