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kupik [55]
3 years ago
10

What causes genetic variation to be preserved or eliminated how does that affect evolution?

Biology
1 answer:
kkurt [141]3 years ago
3 0

Answer: genetic variation is a mutation or a change in the sequence of DNA. It can be preserved if that sequence is needed for a species to survive ( evolution). It can also be preserved if that sequence is strong enough to be passed down from mother to child. The mutation can be eliminated if it causes distress to the animal or if it makes the animals chances of survival smaller. If an extra fin on a dolphin helped it to better escape its predator and better obtain food then this trait may stick around because it is beneficial to the species. If the fin cause the dolphin to swim slower then the dolphin may not survive to reproduce or the trait will not pass on.

Explanation:

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#4) Why is DNA in the mitochondrial DNA known as "Eve's DNA"? *
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Answer

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Explanation:

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As the size of a cell increases
Hoochie [10]

Answer:

The correct answers are-

a. Its metabolic demands increase.

b. It's surface area-to-volume ratio decreases.

c. Its ability to transport enough nutrients in and transport wastes out to meet cellular metabolic demands decreases.

Explanation:

As the size of a cell increases the surface area to volume ratio decrease. So a big cell has less surface area and small volume. Therefore surface area for transfer of metabolic substance per unit volume decreases so the cell's ability to transport enough nutrients in and transport wastes out to meet cellular metabolic demands also decreases.

But due to an increase in the volume of the cell the metabolic demand of cell increases because a larger cell requires more nutrients than a smaller cell to survive which can not be fulfilled efficiently due to less surface-area-to-volume ratio.

Therefore the correct answer is a, b, and c.

3 0
4 years ago
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sattari [20]

Answer:

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Explanation:

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Which structure fuses to form a diploid zygote during sexual reproduction?
bagirrra123 [75]

Answer:

Meiosis is where a diploid cell gives rise to haploid cells, and fertilization is where two haploid cells (gametes) fuse to form a diploid zygote.

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i looked it up

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