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ICSE Class 8 Biology Question 1 of 19

Diseases and First Aid — Question 5

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5
Question

Question 2(e)

Assertion (A): Diseases like cowpox, smallpox, chickenpox are all caused by the same virus.

Reason (R): The vaccine prepared for smallpox contains the fully virulent, living 'cowpox virus.

  1. Both A and R are true.
  2. Both A and R are false.
  3. A is true and R is false.
  4. A is false and R is true.
Answer

A is false and R is true.

Explanation — Diseases like cowpox, smallpox, chickenpox are not caused by the same virus. Cowpox virus and smallpox viruses are similar but not the same. Chickenpox is also caused by a different virus.