Several related bird species live in a desert. One species is much smaller than the other species. This species nests in holes in cacti. Because the bird is so small, it can easily squeeze between the spines of the cactus and create a well-protected nest. This is an example of
A)genetic drift.
B)mutation.
C)natural selection.
D)gene flow.

Question

Quizplus · Accepted Answer

This is an example of natural selection because the smaller bird is better adapted to its environment and has a higher chance of survival and reproductive success due to its ability to nest in cacti without being impeded by spines. Over time, this trait will become more common in the population as those birds who are better adapted are more likely to pass on their genes to their offspring.

Several Related Bird Species Live in a Desert