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State PCS PYQPrelims 2019

UPPCS · Question 133

Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R). Assertion (A): The maximum number of species of butterflies is found in tropical countries. Reason (R): Butterflies cannot tolerate low temperatures. Select the correct answer using the codes given below:

  1. Both (A) and (R) are true and (R) is the correct explanation of (A)
  2. Both (A) and (R) are true, but (R) is not the correct explanation of (A)
  3. (A) is true, but (R) is false
  4. (A) is false, but (R) is true
Show answer & explanation

Answer: (A) Both (A) and (R) are true and (R) is the correct explanation of (A)

Explanation

Per the official key, both are true and R explains A: butterflies are cold-blooded (ectothermic) and need warmth to be active, so their diversity peaks in the tropics.