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alexdok [17]
3 years ago
13

Why is variation required for natural selection?

Biology
2 answers:
aalyn [17]3 years ago
7 0

Answer:

Genetic variation is essential for natural selection because natural selection can only increase or decrease frequency of alleles that already exist in the population. Genetic variation is caused by: mutation. random mating between organisms.

Explanation:

Gelneren [198K]3 years ago
6 0

Answer:

Genetic variation is essential for natural selection because natural selection can only increase or decrease frequency of alleles that already exist in the population.

Explanation:

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What was Darwin's dilemma with micro and macro evolution?
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Answer:The contrast of the difference between what is called "microevolution", and "macroevolution".

Microevolution concerns the transformation of traits in a population of a given species.

Macroevolution concerns evolution above the species level: it includes the diversification of high level taxa, (mass) extinctions, origin and diversification of clades, etc.

Speciation – the arising of new species, and the main processes likely to produce it stands at the boundary between those evolutions.

Notably, when people of the term "evolution" they typically think of macroevolution (think of Darwin's focus on species their origins and transformation).

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Darwin on evolution proposed natural selection as the mechanism of evolution

- Note these important points he outlined:

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• Natural selection can amplify or diminish only heritable traits; acquired characteristics cannot be passed on to offspring

• Evolution is not goal directed and does not lead to perfection; favorable traits vary as environments change.

Explanation:

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Which of these is the correct order through which oxygen enters the body?
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The correct order that oxygen enters the body is definitely C.
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Answer:

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Explanation:

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