Question

Assertion : There is generally monospermy in most of animals.
Reason : Vitelline membrane of ovum checks polyspermy.

• A. Both Assertion and Reason are true and Reason is a correct explanation of Assertion
• B. Both Assertion and Reason are true but Reason is not a correct explanation of Assertion
• C. Assertion is true but Reason is false
• D. Both Assertion and Reason are false
• E. Assertion is false but reason is true.

Answer 1

The correct option is B Both Assertion and Reason are true but Reason is not a correct explanation of Assertion

Entrance of a single sperm into an oocytes called monospermy generally monospermy is found in most of the animals. Cortical granules are extruded in the perivitelline space by exocytosis and some of these are attached along the inner surface of vitelline membrane which now thickens and becomes impervious to any other sperm entry. It is now called fertilization membrane. It prevents the polyspermy.