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mars1129 [50]
3 years ago
8

In as much detail as possible, explain what crossing over is, including when it occurs, why it

Biology
1 answer:
Alika [10]3 years ago
4 0

Explanation:

Crossing over is an important section of the normal segregation of the chromosomes in case of the meiosis. Crossing over happens due to the genetic variations, as the genetic materials gets alter at the time of crossing over. The chromatids that are bind together with the help of the centromere do not remain similar in this case. Crossing over gives rise to variation because the alternation takes place between the nonidentical chromatids having different characteristics or traits. Sometimes gives rise to completely new trait which is not present in both the parents this condition makes the . genetic diversity.

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If a species makes up a small portion of the community by weight, yet exerts a disproportionate influence on community diversity
Marrrta [24]

Answer:

The correct answer will be- Keystone species

Explanation:

The structure of a community is largely determined by the number of species present in the community called species richness and the species diversity.

The species which can play an important role in determining the community could be of two types the foundation species and keystone species.

The species which directly influence the diversity of a community irrespective of their number and abundance is known as the keystone species.

In the given question since the question has discussed the species which disproportionately influence the diversity of the community is known as keystone species.

Thus, keystone species is the correct answer.

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Answer:

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Explanation:

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Help please! 30 Points!
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Answer:

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