Question

Which of the following is true of variation?

Question 1 options:

It is necessary for natural selection.

It exists in almost all populations.

It is caused by mutations and sexual reproduction.

All of the choices are correct.

Answer 1

[AI-generated answer — Bot GPT 3.5]

All of the choices are correct. Variation is necessary for natural selection, it exists in almost all populations, and it is caused by mutations and sexual reproduction.