A complex adaptation like the human eye exists in its present form because
A) past organisms evolved and utilized a transitional form of the modern eye.
B) extreme forms of variation allowed it to evolve in a single jump.
C) it was created by a chance mutation.
D) many organisms have eyes.

Question

Quizplus · Accepted Answer

The complexity of the human eye suggests that it did not evolve in a single jump, and many other organisms have eyes of differing complexity. Therefore, it is most likely that the modern human eye evolved from simpler eyes over time, with past organisms utilizing transitional forms.

A Complex Adaptation Like the Human Eye Exists in Its