Question

Geralda is listing all the conditions under which natural selection occurs. So far, she has listed:

The environment changes.
Organisms in a population have different traits.
Which other condition should she include in her list?

All organisms in the population adapt and reproduce.
The environment returns to normal after some time.
The environment can support only new organisms.
Only some of the organisms survive and reproduce.

Answer 1

Only some of the organisms survive and reproduce.

Natural selection requires variation in traits plus differential survival and reproduction (not all individuals reproduce equally), so those with advantageous traits leave more offspring. The other options are not necessary or correct conditions.