Why is it that natural selection can never result in organisms that are perfectly adapted to their environment?

Question

Quizplus · Accepted Answer

The Answer is All organisms must be able to do many different things, and a characteristic that is valuable for one task is often much less valuable or even a hindrance for a different task. An organism's various characteristics represent a compromise between the competing demands with which all living things must contend.

Why Is It That Natural Selection Can Never Result in Organisms