Question

select the correct answer
some tortoises that feed on grasses were observed on an island. some years later, an environmental change caused the grasses to grow a bit higher off the ground. what evolutionary feature will you expect to see in the tortoises on the island?
a. the tortoises will develop longer necks.
b. the tortoises will develop thicker shells.
c. the tortoises will develop longer tails.
d. the tortoises will develop thicker tongues.

Explanation:

This is based on natural selection: tortoises with slightly longer necks will be better able to reach the higher grasses, survive longer, and pass on this trait to offspring. Over time, the population will have longer necks as the advantageous trait becomes more common. The other traits (thicker shells, longer tails, thicker tongues) do not help with accessing higher grass.

Answer:

A. The tortoises will develop longer necks