Internal fertilization likely evolved
A)to increase the chances of successful fertilization.
B)as a response to copulation.
C)because there were no safe places to lay eggs.
D)as an adaptation to life in a terrestrial environment.

Question

Quizplus · Accepted Answer

Internal fertilization is an adaptation to life in a terrestrial environment where it is more difficult for sperm to reach eggs outside of the body. By keeping fertilization internal, the chances of successful fertilization are increased. Copulation may have arisen as a result of this adaptation, rather than the other way around. The availability of safe places to lay eggs could also have been a factor, but this is less likely to be the sole reason for the evolution of internal fertilization.

Internal Fertilization Likely Evolved