D. the number of mates on the island
their appearance changes cause different birds breeding together can make an impact of how the bird looks
They're all Specialized Cells
Yes. <span>But if you look closely, they are still not exactly the same. They will always have some physical differences due to differences in their environment. Some </span>identical twins can<span> have </span>different heights<span> and weights. This is because </span>height<span> and weight are controlled by what you eat as well your DNA.</span>
Answer: I can only list one (sorry): saber-toothed cats.
Explanation: . . .