Question

Which is part of the theory of evolution by natural selection?

A. All animals in a population are able to reproduce.
B. Animals have no variation among themselves.
C. Adaptations cannot be passed along to later generations.
D. Small changes add up over many generations.

Answer 1

D. Small changes add up over many generations.

Step-by-step explanation:

It's not A because not all animals in a population can always reproduce. Some may be infertile.

It's not B because genetic variety is something that occurs naturally. Because of genetic variety, random mutations can occur (these mutations later become adaptations).

It's not C because adaptations can be passed down to later generations. These adaptations can lead to natural selection which eventually leads to evolution.