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NEETZoologyOrganisms and Populations

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Cattle or goats are never seen browsing on the Calotropis plant growing in abandoned fields. Reason (R): Calotropis produces highly poisonous cardiac glycosides that can disrupt the heart function of the herbivores. In the light of the above statements, choose the most appropriate answer from the o

Options

  1. ABoth Assertion (A) and Reason (R) are correct but Reason (R) is not the correct explanation of Assertion (A)
  2. BAssertion (A) is correct but Reason (R) is not correct
  3. CAssertion (A) is not correct but Reason (R) is correct
  4. DBoth Assertion (A) and Reason (R) are correct and Reason (R) is the correct explanation of Assertion (A)

Correct answer

D. Both Assertion (A) and Reason (R) are correct and Reason (R) is the correct explanation of Assertion (A)

Step-by-step solution

Assertion (A) is a correct statement as herbivores naturally avoid grazing on Calotropis. Reason (R) is also correct and provides the biological explanation for this observation. Calotropis produces highly poisonous cardiac glycosides as a chemical defence mechanism, which can be fatal to herbivores by disrupting their heart function. Therefore, both (A) and (R) are correct and (R) is the correct explanation of (A). Answer: Both Assertion (A) and Reason (R) are correct and Reason (R) is the correct explanation of A

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