NEET 2004 Biology question

The most likely reason for the development of resistance against pesticides in insects damaging a crop is :-

(1)Genetic recombination
(2)Directed mutations
(3)Acquired heritable changes
(4)Random mutationsCorrect

Answer: (4)

Solution

Mutations are random, undirected changes in DNA. In a large insect population a few individuals happen to carry mutations that make them resistant to a pesticide. When the pesticide is sprayed, susceptible insects die and the resistant ones survive and reproduce, so the resistance gene spreads (natural selection

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Question ID VK-089478