Several marine organisms release their gametes into the environment, where sperm attraction and subsequent events lead to successful fertilization. With reference to sea urchins, which one of the following statements is NOT true?

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Biology · Developmental Biology

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Ca 2+ prevents docking of cortical granules of the egg to the cell membrane.

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Answer 1

Addition of resact into a drop of seawater containing sperms specifically attracts sperms of A. punctulata .

Answer 2

IP 3 is formed initially at the site of sperm entry and releases sequestered Ca 2+ .

Answer 3

Ca 2+ prevents docking of cortical granules of the egg to the cell membrane.

Answer 4

Inhibitors that specifically block PLCγ can be circumvented by microinjecting IP 3 into the egg.

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