Question Detail

MIC 121 Protozoa Objective Question
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Question

During conjugation in ciliates like Paramecium, what happens to the macronuclei and micronuclei?
Options
A Both macronuclei and micronuclei fuse and then divide.
B Macronuclei remain unchanged, while micronuclei are exchanged.
C Micronuclei undergo meiosis and are exchanged, while macronuclei disintegrate.
Correct Answer
D Both macronuclei and micronuclei are temporarily lost and then regenerated.
Correct Answer

Option C is the correct answer.

Detailed Explanation

The 'Conjugation' section states, 'Their micronuclei undergo meiosis, and haploid pronuclei are exchanged between the two conjugants.' The accompanying diagram explicitly shows 'macronuclei disintegrate'.

Hint

Recall the distinct roles of micronuclei (reproductive) and macronuclei (vegetative) in ciliates.

Question Info

Course: MIC 121
Topic: Protozoa
Type: Objective
Difficulty: Not specified
Question 892 of 984
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