Question:medium

Sea urchin avoids polyspermy by: A. Fast reaction, accomplished by an electric change in the egg plasma membrane.
B. Slower reaction, caused by the exocytosis of the cortical granules.
C. Fast reaction, caused by the exocytosis of the cortical granules.
D. Slower reaction, accomplished by an electric change in the egg plasma membrane.

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Fast = Flash of electricity. Slow = Solid wall (Envelope).

Updated On: May 28, 2026

A and B Only
C and D Only
A and C Only
B and D Only

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The Correct Option is A

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