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Biology, 12.03.2021 02:00 utjfkdndidndldn62121

I NEED HELP ASAP! Which of the following is true of variation? Select one:
a.
It is necessary for natural selection.
b.
It exists in almost all populations.
c.
It is caused by mutations and sexual reproduction.
d.
All of the choices are correct.

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I NEED HELP ASAP! Which of the following is true of variation? Select one:
a.
It is nec...
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