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Assertion (A): Members of the genus Glom...

Assertion (A): Members of the genus Glomus from mycorrhiza. Reason (R) : Mycorrhiza is an association of plants and fungi.

A

Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B

Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C

Assertion (A) is true but reason (R) is false.

D

Assertion (A) is false but reason (R) is true.

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Assertion (A)**: The assertion states that members of the genus Glomus form mycorrhizae. Mycorrhizae are symbiotic associations between fungi and plant roots, which enhance nutrient absorption for the plant. 2. **Understanding the Reason (R)**: The reason states that mycorrhizae are associations of plants and fungi. This is a correct statement as mycorrhizae involve a mutualistic relationship where both the plant and the fungus benefit. 3. **Evaluating the Truth of Assertion and Reason**: - The assertion is true because Glomus is indeed a genus of fungi that forms mycorrhizal associations with plants. - The reason is also true as it accurately describes what mycorrhizae are. 4. **Determining the Relationship Between Assertion and Reason**: The reason provides a general explanation of what mycorrhizae are, but it does not specifically explain why members of the genus Glomus form mycorrhizae. Therefore, while both statements are true, the reason does not serve as a correct explanation for the assertion. 5. **Conclusion**: Based on the evaluation, both the assertion and the reason are true, but the reason is not a correct explanation of the assertion. **Final Answer**: Both assertion and reason are true, but the reason is not a correct explanation of the assertion. ---
**Step-by-Step Solution:** 1. **Understanding the Assertion (A)**: The assertion states that members of the genus Glomus form mycorrhizae. Mycorrhizae are symbiotic associations between fungi and plant roots, which enhance nutrient absorption for the plant. 2. **Understanding the Reason (R)**: The reason states that mycorrhizae are associations of plants and fungi. This is a correct statement as mycorrhizae involve a mutualistic relationship where both the plant and the fungus benefit. 3. **Evaluating the Truth of Assertion and Reason**: - The assertion is true because Glomus is indeed a genus of fungi that forms mycorrhizal associations with plants. ...
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