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Assertion : In a microsporangium, the ta...

Assertion : In a microsporangium, the tapetal cells possess little cytoplasm and generally have a single prominent nucleus.
Reason : During microsporogenesis, the microspore mother cells (M M Cs) undergo mitotic divisions to produce hapliod microspore tetrads.

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

If both assertion and reason are true but reason is not the correct explanation of assertion

C

If assertion is true but reason is false

D

If both assertion and reason are false

Text Solution

AI Generated Solution

The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states that in a microsporangium, the tapetal cells possess little cytoplasm and generally have a single prominent nucleus. - The tapetum is indeed a layer of cells in the microsporangium, which is responsible for nourishing the developing pollen grains. These cells typically have less cytoplasm and a prominent nucleus. 2. **Analyzing the Reason**: - The reason provided states that during microsporogenesis, the microspore mother cells (MMCs) undergo mitotic divisions to produce haploid microspore tetrads. - However, this statement is incorrect. Microsporogenesis involves meiosis, not mitosis. The microspore mother cells undergo meiosis to produce haploid microspores, which then form tetrads. 3. **Conclusion**: - Since the assertion is true (tapetal cells have little cytoplasm and a prominent nucleus) and the reason is false (microsporogenesis involves meiosis, not mitosis), we conclude that the correct answer is that the assertion is true, but the reason is false. ### Final Answer: - Assertion is true, Reason is false.
### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states that in a microsporangium, the tapetal cells possess little cytoplasm and generally have a single prominent nucleus. - The tapetum is indeed a layer of cells in the microsporangium, which is responsible for nourishing the developing pollen grains. These cells typically have less cytoplasm and a prominent nucleus. 2. **Analyzing the Reason**: - The reason provided states that during microsporogenesis, the microspore mother cells (MMCs) undergo mitotic divisions to produce haploid microspore tetrads. ...
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