Question

Which example best illustrates a condition necessary for natural selection to occur?

Cheetahs have nearly identical genetic makeup.
Clownfish can lay a thousand eggs at a time.
Some bacteria have very specific temperature requirements.
A strawberry plant is able to reproduce asexually

Answer 1

"Clownfish can lay a thousand eggs at a time."

Explanation: Natural selection requires overproduction of offspring so that not all survive, creating a struggle for existence in which heritable variation leads to differential survival and reproduction. Laying many eggs illustrates that overproduction.