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Tom [10]
3 years ago
8

Which adaptation helps polar bears maintain a constant internal temperature in cold weather?

Biology
1 answer:
Slav-nsk [51]3 years ago
8 0

Answer:

Thick layers of fat and fur

Explanation:

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Although selection operates against deleterious alleles in populations, they are rarely lost from these populations. For example
KonstantinChe [14]

Answer:

Deleterious alleles appear sporadically in a population

Explanation:

A population with a deleterious allele will have no or few individuals that have the ability to pass along these traits. These alleles appear less in a population because of selective pressure but they are not always absent. The alleles appear less often but are are not always passed on and the others that are genetically fit are able to pass along their genes. The reason the population equilibrium is not zero is because these alleles do appear but they are not necessarily passed along. These individuals may not be able to reproduce or reach the age of reproduction.

Deleterious alleles appear more often, making individuals less fit genetically, i.e. they pass fewer copies of their genes to future generations. Put another way, natural selection purges the deleterious alleles.

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What role does the pancreas play in digestion
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Enzymes, or digestive juices, are secreted by the pancreas into the small intestine. There, it continues breaking down food that has left the stomach. The pancreas also produces the hormone insulin and secretes it into the bloodstream, where it regulates the body's glucose or sugar level.

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What is meant by “gross examination”?
Veronika [31]

Answer:

Hi there, your answer is B

Explanation:

Gross examination deals with looking at specimens with the naked eye that includes able to diagnosis a certain sickness by looking at the affected organ you can see if that organ had a tumor or other problems.

Hope that helped :)

4 0
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13. Explain why a characteristic which helps an animal to live longer will generally tend to become more
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Since it will help the individual live longer, there is a greater chance that it will reproduce than those with lesser favorable traits. Thus the next generation will resemble the parents with the favorable triat more.

Explanation:

Hope this help

plz mark brainliest

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Tumor-suppressor genes help prevent uncontrolled cell growth. One that is found mutated (and therefore nonfunctional) in more th
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p53 helps the cells from passing on mutations that lead to DNA damage. Hence, it is known as the guardian angel of the cell as it helps fight against cancer. However, if p53 becomes defective or missing, then the mutations will lead to cancer.

Mutations in the p53 can also cause the tumor-suppressing genes to convert into tumor causing genes. Hence, mutations in such kind of genes can be very harmful for the body.

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