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Assertion: Azolla pinnata is used as bio...

Assertion: Azolla pinnata is used as biofertiliser in rice cultivation.
Reason: Azolla performs nitrogen fixation with the help of symbiotic bacteria Bacillus sp.

A

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion

B

If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.

C

If Assertion is true but the Reason is false.

D

If both Assertion and Reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the given assertion and reason, we will break down the statements step by step. ### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states that "Azolla pinnata is used as a biofertilizer in rice cultivation." - **Verification**: Azolla pinnata is indeed a floating pteridophyte that is commonly used in rice fields as a biofertilizer. It helps improve soil fertility by fixing nitrogen. 2. **Understanding the Reason**: - The reason states that "Azolla performs nitrogen fixation with the help of symbiotic bacteria Bacillus sp." - **Verification**: While Azolla does perform nitrogen fixation, the bacteria involved are not Bacillus sp. but rather a cyanobacterium called Anabaena azollae. Therefore, this statement is incorrect. 3. **Conclusion**: - The assertion is true because Azolla pinnata is used as a biofertilizer in rice cultivation. - The reason is false because it incorrectly identifies the nitrogen-fixing bacteria associated with Azolla. - Therefore, the correct answer is that the assertion is true, but the reason is false. ### Final Answer: - Assertion: True - Reason: False
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