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DDT as an Example of Biomagnification

Assertion : A...

Question

Assertion : Agricultural output increased several times after introduction of DDT.
Reason : DDT was the first insecticide used on a wide scale.

A

If both the assertion and the reason are true and the reason is a correct explanation of the assertion

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B

If both the assertion and reason are true but the reason is not a correct explanation of the assertion

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C

If the assertion is true but the reason is false

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D

If both the assertion and reason are false

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E

If the assertion is false but reason is true

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Solution

The correct option is B If both the assertion and reason are true but the reason is not a correct explanation of the assertion
Answer is option A
DDT is toxic to wide range of insect pests while being least toxic to mammals. DDT is persistent and do not break down rapidly in the environment, so it didn’t have to be reapplied often. DDT was effective at killing pests which eventually lead to boost crop yields. Farmers used more and more DDT throughout the 1950s and 1960s to get an increased yield of crop.

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DDT as an Example of Biomagnification

Standard XII Biology

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