How can we explain the exquisite complexity of some complex traits,such as the vertebrate eye?
A)Each intermediate step toward the evolution of complex traits was itself adaptive.
B)Intermediate stages of complex traits were functional and selected for in the past but were selected for a function other than that observed today.
C)A and B
D)None of the above

Question

Quizplus · Accepted Answer

The exquisite complexity of some complex traits, such as the vertebrate eye, can be explained by both A and B. Each intermediate step toward the evolution of complex traits was itself adaptive, meaning that each step provided some benefit to the organism that helped it survive and reproduce. In addition, intermediate stages of complex traits were functional and selected for in the past but were selected for a function other than that observed today. This concept is known as exaptation and helps explain how seemingly complex structures and behaviors could have evolved over time through natural selection.

How Can We Explain the Exquisite Complexity of Some Complex