Once pollen lands on the stigma of a flower, the pollen germinates, creating a pollen tube that grows down the ovule. The sperm cell moves through the tube to fertilize the egg. Based on the evidence from the experiment above, explain how natural selection might have led to directional selection toward higher aperture number.

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A: The mechanism of natural selection is the adaptation and modification of living organism species.

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Q: 1. Give an example of natural selection that happens in your locality.

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Q: Which statement about prezygotic barriers is false?

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A:

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A: The digger bee’s “postcopulatory courtship” consists of elaborate tactile stimulation that the male…

Q: Is epinegetics able to answer for the nature versus nurture debate? Yes or no and why is that so?

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Q: Which of the following changes would cause directional selection? a A habitat made of trees with…

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Pre-Darwinian Concepts