What is often -- but not always -- a feature that accompanies the evolution of internal fertilization?
A)meiotically-produced oocytes
B)synchronized gamete release in a population
C)fusion of egg and sperm within the female
D)a male intromittent organ

Question

Quizplus · Accepted Answer

Internal fertilization often involves the evolution of a male intromittent organ, such as a penis, to transfer sperm directly into the female's reproductive tract. However, this feature is not always present in all species that have evolved internal fertilization.

What Is Often -- but Not Always -- a Feature