Question

Millions of years ago, the ancestors of giraffes had short necks and used to eat leaves from the bushes on the ground. A genetic mutation caused one giraffe's neck to be taller. This long-necked giraffe was able to
eat leaves that were higher up on trees. This gave it an advantage as it was able to access more food than other giraffes. Over millions of years, all of the giraffes became long-necked. Which type of
environmental factor caused this mutation to be inherited? (1 point)

O food availability

O radiation exposure

polluted environment

O exercise requirement

Answer 1

food availability

Because access to higher leaves created a selective advantage for long-necked individuals, so food availability was the environmental pressure that led to the mutation becoming common.