Question Detail

BIO 101 BIO 101 Past Questions Objective Question
Take CBT

Question

Which mechanism ensures that only one sperm fertilizes an egg in external fertilization?
Options
A Acrosomal reaction
B Polyspermy block
Correct Answer
C Zona pellucida activation
D Internal insemination
Correct Answer

Option B is the correct answer.

Detailed Explanation

Polyspermy blocks are rapid changes in the egg's membrane or outer layers that prevent multiple sperm from entering, ensuring proper chromosome number.

Hint

The term refers to blocking 'many sperms'.

Question Info

Course: BIO 101
Topic: BIO 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 660 of 2556
Previous Course Details Next