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Solution


Q.

Assertion: Chemicals and toxins accumulate more and more as we move up the food chain.
Reason: Anything that gets into biological tissue, that is not normally there, has the potential to accumulate and magnify.
1 Both assertion and reason are correct and reason is the correct explanation of assertion.  
2 Both assertion and reason are correct but reason is not the correct explanation of assertion.  
3 Assertion is true but Reason is false.  
4 Assertion is false but Reason is true.  

Ans.

(1)

Biomagnification is the increase in concentration of toxins up the food chain. Chemicals and toxins accumulate more and more as we move up the food chain, because they do not get broken down in the body. Anything that gets into biological tissue, that is not normally there, has the potential to accumulate and magnify as it moves up the food chain. Thus, both assertion and reason are correct and reason is the correct explanation of the assertion.