An e. coli cell with an inactivating mutation in the laci gene is expected to _____.
Answers
An E. coli cell with an inactivating mutation in the laci gene will exhibit constitutive expression of the lac operon, producing lacZ, lacY, and lacA proteins continuously.
It is anticipated that the lac operon will express itself constitutively in an E. coli cell with an inactivating mutation in the laci gene. The lac operon's operator region ordinarily binds to the lac repressor protein, which is encoded by the laci gene. This prevents transcription of the lac genes. The lac operon is persistently active even in the absence of a functional LacI protein, causing the lacZ, lacY, and lacA genes to continuously be transcribed. As a result, even in the absence of lactose or lactose analogs, the cell will still produce large amounts of -galactosidase (encoded by lacZ), lactose permease (encoded by lacY), and transacetylase (encoded by lacA).
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Related Questions
I need help pls help me
Answers
Answer:
It's A. Cuz' all her experiments got the same results.
Explanation:
Identify the 6 steps jaguar would use to forecast for the new S-type jaguar
Answers
Jaguar would use the following six steps to forecast for the new S-type Jaguar:
1. Environmental Scanning: This process involves the gathering of information on all external factors that might affect the production and sale of the S-type Jaguar. This can include economic trends, political factors, and social factors such as changing lifestyles or consumer trends.
2. Market Segmentation: This process involves dividing the target market for the S-type Jaguar into smaller, more manageable groups based on specific demographic, geographic, and psychographic variables.
3. Forecasting Demand: This process involves using statistical tools and market research data to estimate the level of demand for the S-type Jaguar.
4. Setting Objectives: This process involves setting clear objectives for the production and sale of the S-type Jaguar, such as sales targets or market share goals.
5. Developing a Marketing Plan: This process involves developing a marketing plan that outlines the steps that will be taken to achieve the objectives set out in the previous step.
6. Implementing and Monitoring the Plan: This final step involves putting the marketing plan into action and monitoring its effectiveness to ensure that the objectives are being met and any necessary adjustments can be made if necessary.
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Select the correct answer.
The images show two different types of Galapagos tortoises that scientists believe descended from the same species. The first type (left) are found on islands that have high vegetation and few grasses. The second type (right) are found on an island that has large amounts of grasses and low-lying shrubs. What explains the type of turtle found on the islands with high vegetation?
The image shows two different types of Galapagos tortoises. The tortoise on the left has a vegetarian and few grasses. The tortoise on the right has a large number of grasses and low-lying shrubs.
A.
The environment triggered a gene mutation in neck length in order to help the turtle survive.
B.
Mutations are random, so it is by chance that turtles with longer necks live on these islands.
C.
Turtles with genes for long necks had a better chance of surviving to reach reproductive age.
D.
Turtles with short necks completely lacked adaptations for finding food, so they died off.
Answers
The explanation for the type of turtle found on the islands with high vegetation is that Turtles with genes for long necks had a better chance of surviving to reach reproductive age.
The correct option is C.
What is adaptation?Adaptation is the process by which organisms adapt to their environment as a result of the development of special features or structures that help them to survive in their environment.
Then turtles with genes for long necks were better suited to obtain food from the high vegetation. Hence, they were able to survive.
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What chemical bond most likely stores the mos energy?
Answers
The chemical bond that typically stores the most energy is the covalent bond, specifically the triple bond, as it involves the sharing of the highest number of electrons.
Covalent bonds involve the sharing of electrons between atoms, resulting in the formation of a stable molecule. Within covalent bonds, there are variations in bond strength, which correspond to the amount of energy required to break the bond.
Among covalent bonds, triple bonds are generally the strongest and store the most energy. Triple bonds involve the sharing of three pairs of electrons between two atoms. Examples include nitrogen gas (N2) and acetylene (C2H2), where the nitrogen and carbon atoms form triple bonds, respectively.
The strength of a covalent bond depends on several factors, including the number of shared electron pairs and the types of atoms involved. Bonds with higher bond orders (such as double or triple bonds) tend to be stronger and store more energy compared to single bonds.
It is important to note that other types of chemical bonds, such as ionic bonds and metallic bonds, also play significant roles in storing and releasing energy, but in general, covalent bonds, particularly triple bonds, are known for storing the most energy.
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Development of only one Pollen Grain from microspore Mother cell is reported in family
Answers
Answer:
Pollen grains are produced by meiosis of microspore mother cells that are located along the inner edge of the anther sacs (microsporangia). ... The tube cell (also referred to as the tube nucleus) develops into the pollen tube. The germ cell divides by mitosis to produce two sperm cells.
what are stromatolites? fossils of large, mat-shaped plants that still live in western australia fossils of large, mat-shaped plants that still live in western australia rocks thought to be fossils made by ancient microbes rocks thought to be fossils made by ancient microbes microscopic fossil structures that look like individual bacteria microscopic fossil structures that look like individual bacteria living colonies of bacteria
Answers
Stromatolites are rocks thought to be fossils made by ancient microbes.
Stromatolites are sedimentary structures that form in shallow aquatic environments, such as lagoons, lakes and coastal oceans.
These structures are formed by the accumulation of sedimentary layers on bacterial mats, and are one of the oldest known fossils, dating back over 3.5 billion years. Stromatolites provide some of the most ancient records of life on Earth, and are important for understanding the evolution of early life forms.
In conclusión, the correct statement is ''rocks thought to be fossils made by ancient microbes.''
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which statements correctly explain why dna from two individuals will produce different fragments after cutting by restriction enzymes?
Answers
DNA from two individuals will produce different fragments after cutting by restriction enzymes because of the differences in their genetic sequences.
Restriction enzymes cut DNA at specific sequences known as restriction sites, which vary between individuals. For example, if two individuals have a difference of one base pair in the recognition sequence, then the restriction enzyme will not be able to recognize the sequence in one individual but will recognize it in the other.
As a result, the individual with the different sequence will have a different fragment size than the other individual when cut by the same restriction enzyme. Additionally, if two individuals share the same recognition sequence, but the sequence is located in a different place in the genome, then the resulting fragment size will also be different between the two individuals.
Therefore, due to the differences in the genetic sequences, individuals will produce different fragments when cut by the same restriction enzyme.
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When writing a research paper, look for credible sources. Science doesn't show bias, but humans do.
Avoid sites and articles that provide facts without citing proper scientific evidence. You must be able to identify reliable sites so that the data in your research paper is credible.
Use sources that end in gov. These government sites are reliable sources. You can also use sites ending in edu. They're generally trustworthy, but sometimes students, not scientists, write content for edu websites. Always identify the source's author before proceeding. Some org and com sites are credible, but it's important to verify their authenticity. When reviewing a source, ask these questions:
• Who authored the document?
• Is the author a genetics expert?
• What is the document's purpose?
. Does the document state facts that scientists can prove with evidence?
• Does the document include opinions?
How old is the document?
Do other credible sources support the document's statements?
Search for credible websites and note the information they contain. Write down two sources that you'll use for your research paper, and cite them using Modern Language Association (MLA)
Answers
When writing a research paper, it is crucial to use credible sources. To ensure the credibility of the sources, it is important to verify their authenticity and reliability. One should avoid using sites that do not cite proper scientific evidence or provide biased information.
Reliable sources include government sites ending in .gov, and educational sites ending in .edu. However, it is still important to identify the author and purpose of the document to ensure its authenticity. It is also important to ensure that the document states facts that scientists can prove with evidence, rather than opinions.
Two credible sources for a research paper on genetics could be the National Human Genome Research Institute website (www.genome.gov) and the Genetics Society of America website (www.genetics-gsa.org). To cite these sources using MLA format, the following format can be used:
National Human Genome Research Institute. "Genetics and Genomics." National Institutes of Health, 2022, www.genome.gov/genetics-genomics.
Genetics Society of America. "About GSA." GSA, 2022, www.genetics-gsa.org/about-gsa/.
By using credible sources and citing them properly, one can ensure the credibility and accuracy of their research paper.
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In pea plants, purple flowers (P) are dominant to white flowers (p) and yellow peas (Y) are dominant to green peas (y). What is a possible phenotype for a cross between PpYY and ppYy pea plants
Answers
A possible phenotype for a cross between PpYY and ppYy pea plants is plants with purple flowers and yellow peas.
This is because the purple flower trait (P) is dominant over the white flower trait (p), and the yellow pea trait (Y) is dominant over the green pea trait (y). Both of the plants in the cross are heterozygous, meaning they carry one allele of the dominant trait and one allele of the recessive trait. When the two plants are crossed, their alleles will mix and produce offspring with a combination of the traits.
Since both the purple flower and the yellow pea traits are dominant, the offspring will likely have purple flowers and yellow peas. In order for the offspring to have white flowers and green peas, both of the parental plants would need to be homozygous recessive for their respective traits.
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neurons that carry impulses from the cns out to the muscles and glands.A. TrueB. False
Answers
Explanation:
yes true that neurons that carry impulses from the cns out to the muscles and glands
How do major geologic events help build Earth’s timeline?
Answers
cellular respiration allows organisms to release the energy stored in the chemical bonds of glucose. the energy in glucose is used to produce ATP, which cells use to supply their energy needs. during aerobic cellular respiration, oxygen is reduced and ____ is produced as a by-product of this specific intermediate
reaction
Answers
Answer:
Carbon dioxide
Explanation:
hope it helps you<3Claims. Evidence Reasoning How
is the structure of a unicellular organism
different than the structure of a
multicellular organism? How does this affect
function? Summarize evidence to support
your claim and explain your reasoning.
Answers
A multicellular organism is made up of numerous cells that cooperate, whereas a unicellular organism only contains one cell. Each function must be managed by a single cell, whereas in multicellular organisms.
What is in a unicellular organism?Any living creature only with one cell, which performs all crucial body functions like metabolism, waste, and fertilization, is referred to as a "unicellular organism." Unicellular organisms can either be prokaryotes or eukaryotes. Unicellular organisms include bacteria, archaea, unicellular fungi, and unicellular protists.
How is it important to unicellular organisms?Cell division in unicellular organisms is crucial only for reproduction. They divide their cells through a process called mitosis to create their daughter cells. Cell division is crucial for the development of new cells and reproduction in multicellular animals.
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Postpartum bowel sluggishness is related to which of the following
a)Decreases in intestinal muscle tone
b)Hormonal levels
c)Intra-abdominal pressure
d)All of the above
Answers
Postpartum bowel sluggishness is related to all of the following: decreases in intestinal muscle tone, hormonal levels, and intra-abdominal pressure. Hence, option (d) All of the above is the correct option.
Postpartum bowel sluggishness refers to a reduction in the regularity or total absence of bowel movements following childbirth. Due to several variables, including a decrease in intestinal muscle tone, hormonal levels, and intra-abdominal pressure, postpartum bowel sluggishness may occur.
Bowel sluggishness is a common problem following childbirth, and it can be related to the following factors: Decreases in intestinal muscle tone: As a result of the pressure of the uterus and the growing fetus on the intestines, intestinal tone decreases during pregnancy. As a result, the digestive system's muscle contractions (peristalsis) slow down and bowel movements occur less frequently.
Hormonal levels: The hormonal fluctuations that occur during pregnancy and childbirth can have an effect on bowel function. Hormones, particularly progesterone, can cause the muscles of the intestine to relax, leading to bowel sluggishness.
Intra-abdominal pressure: During childbirth, the muscles of the pelvic floor and rectum can be weakened, resulting in an inability to contract or relax the muscles. This may result in straining to defecate and bowel sluggishness.
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Which of the following is an accurate description of the process and explain why that is the correct answer
Answers
Answer:
D is the correct answer
An accurate description of the process shown in the figure is the formation of a covalent peptide bond in a dehydration synthesis reaction (Option d).
A dehydration synthesis reaction is a type of chemical reaction that releases a water (H2O) molecule as a byproduct.A peptide covalent bond is a dehydration synthesis reaction between the amino (NH2) group of one amino acid and the carboxyl (COOH) group of another.Moreover, a covalent bond occurs when two atoms share their electrons.In conclusion, an accurate description of the process shown in the figure is the formation of a covalent peptide bond in a dehydration synthesis reaction (Option d is correct).
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Which defines a cell?
A. microscopic organism I in water
B. protein molecules in animals
C. the basic unit of living things
D. the smallest type of animal
Answers
Answer:
C
Explanation:
Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. ... Cells have many parts, each with a different function. Some of these parts, called organelles, are specialized structures that perform certain tasks within the cell.
cells. the smallest part of a living thing that can carry out the activities needed for life. organism. a living thing. organelle.
PLS HELP THIS IS DUE TODAY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Write a 4 to 5 sentence paragraph that compares and contrasts animal-like, plantlike, and funguslike protists. include their method of obtaining nutrition and their capacity for movement
Answers
How might a pyramid of energy for a grassland community differ between summer and winter? think about the effects the different abioc condions of each season might have on the ecosystem. use your conclusions to draw a pyramid of energy for each season. explain any differences between the two pyramids.
Answers
A pyramid of energy for a grassland community may differ between summer and winter because to the higher amount of solar radiation in summer to produce more food chemical energy through all different levels of the energy pyramid chain.
What is an energy pyramid chain?
An energy pyramid chain is a diagram that shows how energy passes through different trophic levels in an ecosystem, which depends on the amount of biomass generated by producer organisms (e.g., plants) that need solar radiation to produce biomass through a process called photosynthesis.
In conclusion, a pyramid of energy for a grassland community may differ between summer and winter because to the higher amount of solar radiation in summer, which leads to the generation of more food chemical energy to be passed through different levels of the energy pyramid chain.
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If all the following DNA fragments were analyzed on an electrophoresis gel, which one would migrate farthest from the negative electrode? a( n ) ________ organism is one that requires oxygen for growth.? The bacterial chromosome is? a.usually circular. b.found in a nucleoid. c.found in a nucleus. d. both circular and found in a nucleoid. e. both circular and found in a nucleus.
Answers
The DNA fragment with the smallest size would migrate farthest from the negative electrode on an electrophoresis gel. An obligate aerobe is an organism that requires oxygen for growth.
It relies on aerobic respiration to generate energy through the complete breakdown of organic molecules, such as glucose, in the presence of oxygen. Oxygen serves as the final electron acceptor in the electron transport chain, allowing for the efficient production of ATP. Obligate aerobes cannot survive in the absence of oxygen and depend on its availability for their metabolic processes.
The bacterial chromosome is usually circular and found in a nucleoid. Unlike eukaryotic cells that have a membrane-bound nucleus, bacterial cells do not have a true nucleus. Instead, their genetic material, including the chromosome, is found in the nucleoid region, which is a concentrated area within the cytoplasm. The bacterial chromosome typically consists of a circular DNA molecule that contains the genetic information necessary for the cell's survival and reproduction. This circular shape of the bacterial chromosome distinguishes it from the linear chromosomes found in eukaryotic organisms.
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Do you think making energy conservation
a social competition was successful in
motivations people to reduce how much
energy they were using?
Why or why not?
Answers
If the energy conservation is made a matter of social competition, it would make more people to be aware of the issues that surround energy conservation.
What is energy conservation?We know that energy conservation is a topic that has become a very hot issue and a hot discourse among several energy stake holders in the society. It is important that energy should be conserved because of the fact that the generation of energy requires a lot input of natural resources.
It has become much more important that the conversation about energy conservation should be made a subject that would come into discussion in the public domain. This is because, the discussion would be able to reengineer the way that people approach the matter of energy.
The discussion on the matter of energy is aimed to sensitize the generality of the population regarding the importance of energy and its impact on the society.
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unlike vertebrate organisms, plants do not have a skeleton to provide support. the extracellular matrix (i.e. the cell wall) of the plant cell works together with which subcellular structure to provide overall support for the plant?
Answers
The cell wall works with the cytoskeleton of the plant cell to provide overall support for the plant.
What is cell?A cell is the basic structural, functional and biological unit of all known living organisms. Cells are the smallest unit of life that can replicate independently and are capable of functioning on their own. The study of cells is called cell biology, cellular biology, or cytology. Cells consist of cytoplasm enclosed within a membrane, which contains many biomolecules such as proteins and nucleic acids. Organisms can be classified as unicellular (consisting of a single cell) or multicellular (consisting of many cells). All cells arise from other cells through cell division. In multicellular organisms, every cell in the organism's body derives ultimately from a single cell in a fertilized egg. The cell is also considered to be the basic unit in many pathological processes.
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The cytoskeleton is a network of protein fibers that is composed of three main elements: microfilaments, intermediate filaments, and microtubules. It is responsible for cell movement, cytokinesis, and mitosis. It works together with the extracellular matrix of the plant cell to provide overall support for the plant, helping it maintain its shape, movement, and stability.
What is cytoskeleton?The cytoskeleton is a subcellular component that collaborates with the extracellular matrix of the plant cell to maintain the entire plant. A web of protein fibers called the cytoskeleton runs throughout the cell's cytoplasm. Microfilaments, intermediate filaments, and microtubules make up its three primary parts.
The thinnest of the three cytoskeleton elements, microfilaments are composed of actin proteins. By contracting and expanding, they are principally responsible for cell migration. Moreover, they aid cytokinesis by forming the contractile ring of the cell.
Proteins including keratin, vimentin, and neurofilament make up intermediate filaments. These filaments give the cell stability and structural support. Moreover, they help organelles adhere to the cell membrane.
The third and thickest of the cytoskeleton's three components are microtubules. They are made of tubulin proteins and are essential for the mobility, movement within the cell, and transportation of chemicals. Moreover, they create the spindle fibers needed for mitosis.The cytoskeleton supports the entire plant by collaborating with the extracellular matrix of the plant cell. The plant benefits from this support by maintaining its stability, mobility, and form.
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Assignment
Now it is your turn! Remember this is an Earth Science class so the observation needs to be related to Earth Science. If you cannot think of an observation on your own you could rewatch the Process of Science video and make observations about one of the craters mentioned in that video. Other ideas include: the dinosaurs became extinct at the end of the Cretaceous (65 million years ago); tornadoes are more frequent in Spring; or hurricanes only occur in Summer and Fall.
Step 1. Make an observation. What is your observation?
Step 2. Ask a question. What is your question?
Step 3. Hypothesize about a potential answer or explanation. What is your hypothesis? Remember it needs to explain or potentially answer your question in detail.
Step 4. Make a prediction if our hypothesis is correct. What is your prediction?
Step 5. Design an experiment or study that will test your prediction. Give some details of an experiment or study that could test your prediction and hypothesis.
Step 6. Test the prediction. You do not need to complete this step, but continue on to Step 7.
Step 7. Iterate. Do you think you will need to iterate? Even if you think your hypothesis is likely to be correct is there any room for refinement of your hypothesis? Write a sentence explaining whether your hypothesis will need to be corrected or refined.
Answers
Step 1. Observation: There are more hurricanes in the summer and fall.Step 2. Question: Why do hurricanes only occur in the summer and fall? Step 3. Hypothesis: Hurricanes only occur in the summer and fall because of the high sea surface temperatures that cause a convection current and create the necessary wind conditions for hurricane formation.
Step 4. Prediction: If hurricanes only occur in the summer and fall because of the high sea surface temperatures and wind conditions created by a convection current, then we would expect to see more hurricanes in areas with warm water temperatures during the summer and fall seasons.
Step 5. Experiment: To test this prediction, researchers could compare sea surface temperatures and hurricane frequency data for various regions in different seasons. They could also monitor hurricane formation and intensity in regions with varying water temperatures throughout the year.
If the data show a correlation between warm sea surface temperatures and hurricane frequency in the summer and fall, it would support the hypothesis that hurricanes only occur during these seasons due to the necessary convection currents and wind conditions.
Step 6. Testing the prediction: Collect the data and analyze it. See if the data supports or disproves the hypothesis. If the data supports the hypothesis, then it provides evidence that hurricanes only occur in the summer and fall due to the necessary convection currents and wind conditions created by warm sea surface temperatures.Step 7. Iteration:
While the hypothesis provides a plausible explanation for why hurricanes only occur in the summer and fall, it is important to note that there are many other factors that can influence hurricane formation and intensity, such as wind shear and atmospheric pressure. Therefore, the hypothesis may need to be refined as more research is conducted.
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whats the meaning of cohesion
Answers
Answer:the action or fact of forming a united whole.
"the work at present lacks cohesion"
Similar:
unity
togetherness
solidarity
bond
sticking together
continuity
coherence
connection
linkage
interrelatedness
PHYSICS
the sticking together of particles of the same substance.
Explanation:
The distinct characteristics of different cell types in a multicellular organism are produced mainly by the differential regulation of the
Answers
The distinct characteristics of different cell types in a multicellular organism are produced mainly by the differential regulation of the genes.
What is gene regulation?Genes are responsible for the synthesis of protein molecules in the cell.
All the cells of a living organisms contain the same sequence of genes, however, they differ in the way they are expressed.
This makes cells exhibit different characteristics in the same living organism.
Therefore, the distinct characteristics of different cell types in a multicellular organism are produced mainly by the differential regulation of the genes.
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The "master controller" gland is the _____. thyroid adrenal pituitary thalamus
Answers
Answer:
Hypothalamus is the correct answer to the given question.
Explanation:
Hypothalamus in the brain is the tiny portion of the mind also the Hypothalamus is situated at the foot of the nervous system .The Hypothalamus is just next to the pituitary gland. Hypothalamus is produced by a variety of nucleus as well as the nervous fibers. It's own neuronal links
The main objective of Hypothalamus is to hormonal fluctuation as well as controlling the temperature of the body.All the other option is not the master controller gland that's why these are incorrect option .Answer:
The pituitary gland is the master controller gland.
Explanation:
I just did this: The pituitary gland is sometimes called the "master" gland of the endocrine system because it controls the functions of many of the other endocrine glands.
Which statement best describes the difference between proteins and carbohydrates?
Answers
The difference is that Carbohydrates are used for energy (glucose). Fats are used for energy after they are broken into fatty acids. Protein can also be used for energy, but the first job is to help with making hormones, muscle, and other proteins. Broken down into glucose, used to supply energy to cells.
The difference between proteins and carbohydrates is that carbohydrates are composed of carbon, oxygen and hydrogen while protein are composed of carbon, oxygen and nitrogen.
What is carbohydrate?The term carbohydrate refers to the class of food that is known to liberate energy. It is contained in foods such as yam and rice.
The statement that accurately states the difference between proteins and carbohydrates is that carbohydrates are composed of carbon, oxygen and hydrogen while protein are composed of carbon, oxygen and nitrogen.
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During the Dutch Fork vs Irmo softball game, Bobby tore a connective tissue that attaches his thigh bone to his hip-bone. Which tissue was affected?
Answers
What type of blood is a t-cell
Answers
Answer:
white blood cell
Explanation:
Answer:
white blood cells
Explanation:
A type of white blood cell. T cells are part of the immune system and develop from stem cells in the bone marrow. They help protect the body from infection and may help fight cancer.
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Environmental factors can influence natural selection because they can increase or decrease
ОООО
the number of chromosomes in an individual.
the number of chromosomes in a population.
the amount of genetic variation in an individual.
the amount of genetic variation in a population.
Answers
Answer:
D
Explanation:
A and B are wrong because environmental impacts can't change the amount of chromosomes an animal has. D is a better answer than c because genetic variation happens within a population rather than an individual.
Answer:
Answer is the amount of genetic variation in a population Natural selection gets impacted by environmental factors.
Explanation:
What is the main reason we need protein in our diets
Answers
Answer:
Every cell in the human body contains protein. The basic structure of protein is a chain of amino acids. You need protein in your diet to help your body repair cells and make new ones. Protein is also important for growth and development in children, teens, and pregnant women
Explanation: