Many Amphibian Species Release Their Sperm and Eggs Directly into a Watery

Multiple Choice

Many amphibian species release their sperm and eggs directly into a watery environment.All of the following mechanisms might ensure species-specific fertilization in these populations except _____.

A) acrosomal complexes in sperm
B) complex coverings of the egg
C) specific protein binding between sperm and egg
D) fertilization envelopes
E) blocking of non-species-specific mRNA sequences