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Human Health and Disease — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYHuman Health and Disease1 Mark
Question
For question, two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.

  1. Both assertion and reason are true, and reason is the correct explanation of assertion.
  2. Both assertion and reason are true, but reason is not the correct explanation of assertion.
  3. Assertion is true, but reason is false.
  4. Both assertion and reason are false.

Assertion : There is no chance of transmission of malaria to man on the bite of a male Anopheles mosquito.

Reason: It carries a non-virulent strain of Plasmodium.

✓

Answer

  1. Assertion is true, but reason is false.

Explanation:

There is no chance of transmission of malaria to man on the bite of a male Anopheles mosquito. The mouthparts of male mosquito is organised in such a manner that they cannot suck the human blood. They feed mainly on the leaf and fruit juices. Thus spreading malaria through male Anopheles is next to impossible.

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