Now-a-days use of DDT as insecticide is banned becauseA. it is less effective than other pesticidesB. organisms develop resistance to itC. productoin cost is very highD. it has long residual effect

Now-a-days use of DDT as insecticide is banned becauseA. it is less ef

1.	Now-a-days use of DDT as insecticide is banned becauseA. it is less effective than other pesticidesB. organisms develop resistance to itC. productoin cost is very highD. it has long residual effect
Answer» Correct Answer - D DDT is banned because, it shown deleterious effects on organisms and is found in considerably high toxic amount in all trophic level organisms. It is degraded biologically and has long residual effects on almost all living organisms due to the high concentration of accumulation in higher trophic levels, i.e. biomagnification.

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Now-a-days use of DDT as insecticide is banned becauseA. it is less effective than other pesticidesB. organisms develop resistance to itC. productoin cost is very highD. it has long residual effect

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