The vitelline layer of the sea urchin egg
A) is outside of the fertilization membrane.
B) releases calcium, which initiates the cortical reaction.
C) has receptor molecules that are specific for binding acrosomal proteins.
D) is first visible only when organogenesis is nearly completed.
E) is a mesh of proteins crossing through the cytosol of the egg.
Answer: C) has receptor molecules that are specific for binding acrosomal proteins.
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