Question

Millions of years ago, the ancestors of giraffes had shorter necks and used to eat leaves from the bushes on the grounds. 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 the other giraffes. Over millions of years, giraffe populations all became long-necked. Which type of environmental factor caused this mutation to be inherited?(1 point)
Responses

Radiation exposure
Radiation exposure

Exercise requirement
Exercise requirement

Food availability
Food availability

Polluted environment
Polluted environment
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Answer 1

Food availability

Because individuals with the long-neck mutation could reach more food (higher leaves), they had a survival/reproductive advantage and the trait was passed on by natural selection.