Sperm-egg interactions are species-specific in sea urchins,but not in mammals.What might be one reason for this difference?
A)Other kinds of signals serve similar functions in mammals.
B)Sperm-egg recognition relies on egg cytoplasmic components in mammals.
C)Sperm have evolved to become more selective in mammals.
D)Sea urchin fertilization occurs in open ocean.

Question

Quizplus · Accepted Answer

Sea urchin fertilization occurs in the open ocean, where many species release their gametes simultaneously, necessitating species-specific interactions to prevent cross-species fertilization. In contrast, mammals have internal fertilization, reducing the need for such specificity.

Sperm-Egg Interactions Are Species-Specific in Sea Urchins,but Not in Mammals