CBSE 2025, Compartment, Set 1

Question

Assertion (A): Competition is a type of interspecific interaction between two or more species when the resources necessary for them are limited and adversely affect them.
Reason (R): Special adaptation may allow the competing species to coexist in the same geographical area.

Select the correct option: A). Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A). B). Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A). C). Assertion (A) is true, but Reason (R) is false. D). Assertion (A) is false, but Reason (R) is true.

Edvaya · Accepted Answer

The correct answer is Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).. **SOLUTION** **Assertion (A) is True:** Competition generally occurs when closely related species fight for the same limited resources, significantly reducing the fitness ('r') of both species. **Reason (R) is True:** Competing species often evolve special mechanisms to promote coexistence rather than exclusion, such as "Resource Partitioning" (e.g., choosing different foraging times or slightly different prey). **Conclusion:** Both are correct biological statements. However, adaptations promoting coexistence do not explain *why* competition is defined as an adverse interaction over limited resources. Therefore, R is not the correct explanation of A.

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