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Why did population of DDT resistant mosquitoes increase after a few years?

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Question

Why did population of DDT resistant mosquitoes increase after a few years?

Very Short Answer
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Solution

Resistant mosquitoes survived the sprays and reproduced, increasing the frequency of resistance in the population.

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Chapter 9: Theory of Evolution and Evolution of Man - EXERCISES [Page 524]

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Sarita Aggarwal Biology [English] Class 12 ISC
Chapter 9 Theory of Evolution and Evolution of Man
EXERCISES | Q I. 26. | Page 524
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