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Which one of the following phenomena supports Darwin’s concept of natural selection in organic evolution?

1. Development of transgenic animals
2. Production of ‘Dolly’, the sheep by cloning
3. Prevalence of pesticide resistant insects
4. Development of organs from ‘stem cells’ for organ transplantation

Correct answer: Prevalence of pesticide resistant insects

Solution

Pesticide resistance is a classic example of natural selection: insects with resistance survive spraying, reproduce, and pass on the trait. Over generations, the resistant population becomes more common, which directly supports Darwin’s idea.

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