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Assertion (A). In Spirogyra, some cells ...

Assertion (A). In Spirogyra, some cells in one of the two filaments become empty after conjugation.
Reason (R ). The aplanogametes from the cells of the filaments pass through conjugation tubes into the cells of the other filaments.
(a) Both A and R are true and R is correct explanantion of A
(b) Both A and R are true and R is not correct explanation of A
(c) A is true but R is false
(d) A is false but R is true

A

Both A and R are true and R is correct explanantion of A

B

Both A and R are true and R is not correct explanation of A

C

A is true but R is false

D

A is false but R is true.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze the assertion and reason provided regarding Spirogyra and determine their truthfulness and relationship. ### Step-by-Step Solution: 1. **Understanding the Assertion (A)**: - The assertion states that "In Spirogyra, some cells in one of the two filaments become empty after conjugation." - This is true because during the process of conjugation in Spirogyra, the nuclei from certain cells are transferred to other cells, leaving some cells empty. 2. **Understanding the Reason (R)**: - The reason states that "The aplanogametes from the cells of the filaments pass through conjugation tubes into the cells of the other filaments." - This is also true. In Spirogyra, aplanogametes (male gametes) move through conjugation tubes to fuse with the female gametes in the other filament. 3. **Analyzing the Relationship**: - The assertion is true, and the reason is true as well. - Furthermore, the reason explains the assertion because the empty cells are a direct result of the transfer of nuclei through the conjugation tubes. 4. **Conclusion**: - Both the assertion and reason are true, and the reason correctly explains the assertion. Therefore, the correct answer is: - (a) Both A and R are true and R is the correct explanation of A. ### Final Answer: (a) Both A and R are true and R is the correct explanation of A. ---
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