AIIMS 2018 Zoology Bt Cotton Assertion Reason Question
Assertion: Bt cotton is resistant to insects Reason: Butterfly feeding on Bt cotton will die
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not correct explanation of A
A is true but R is false
A and R are false
Correct Answer
Detailed Explanation
Bt cotton is genetically modified to express a protein from the bacterium Bacillus thuringiensis, which provides resistance to certain insect pests, making assertion A true. However, the reason provided is false because butterflies are not the target pests of Bt cotton; instead, it primarily affects caterpillars of specific moths and butterflies, thus leading to the death of those pests, not butterflies in general.
Option A cannot be true if R is false, eliminating options A and B. Option D is incorrect because assertion A is true. Therefore, option C accurately reflects that while Bt cotton is resistant to insects, the claim about butterflies is incorrect.
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