What is the structure that forms after a sperm penetrates the egg, to prevent additional sperm from entering?
1) egg capsule
2) plasma membrane
3) fertilization membrane

3) Fertilization membrane.

Explanation:

When sperm cell fertilizes an egg cell, signal transdution occurs which causes fertilization membrane to be formed. Ovum thickens and hardens the vetelline membrane causing separation and prevents multiple fertilization by the spermatozoon.

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you and have a wonderful day

lipid

explanation: