AIIMS2017Botany-Ecosystem

AIIMS 2017 Botany Decomposition Assertion Reason Question

Type: Assertion Reason-conceptual-Medium-Class 12

In each of the following questions statement of Assertion is given followed by corresponding statement of Reason. Of the statements, mark the correct answer as Assertion (A) The rate of decomposition of detritus is reduced in the regions of high altitude. Reason (R) It happen due to immobilisation of nutrients.

A

Both Assertion and Reason are true and Reason is the correct explanation of Assertion

B

Both Assertion and Reason are true but Reason is not the correct explanation of Assertion

C

Assertion is true but Reason is false

D

Both Assertion and Reason are false

Correct Answer

Option D

Detailed Explanation

Option D is correct because both the Assertion and Reason are false. The rate of decomposition of detritus is generally slower in high-altitude regions due to lower temperatures and reduced microbial activity, not specifically due to nutrient immobilization. Additionally, immobilization of nutrients refers to the process where nutrients become unavailable to plants, which does not directly explain the rate of decomposition. Other options are incorrect as they assume either the truth of the statements or a causal relationship that does not exist in this context. Understanding the factors affecting decomposition, such as temperature, moisture, and microbial presence, is crucial in ecology.

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