Essay
DDT was first used as an insecticide in 1942. Resistance genes existed before this time in houseflies and other insects. By 1970, no farmer would bother using this chemical. Why?
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As DDT was used, the susceptible animals...View Answer
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Correct Answer:
Verified
As DDT was used, the susceptible animals...
View Answer
Unlock this answer now
Get Access to more Verified Answers free of charge
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