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  • Human body is made up of five important components, of which water is the main component.Food as well as potable water are essential for every human being. The food is obtained from plants through agriculture. Pesticides are being used extensively for

Human body is made up of five important components, of which water is the main component.Food as well as potable water are essential for every human being. The food is obtained from plants through agriculture. Pesticides are being used extensively for a high yield in the fields. These pesticides are absorbed by the plants from the soil along with water and minerals and from the water bodies these pesticides are taken up by the aquatic animals and plants. As these chemicals are not biodegradable, they get accumulated progressively gets accumulated in our bodies and greatly affects the health of our mind and body.

(a) Why is the maximum concentration of pesticides found in human beings ?

(b) Give one method which could be applied to reduce our intake of pesticides through food to some extent.

(c) Various steps in a food chain represent :

    (a) Consumer         (b) Producer

    (c) Ecosystem         (c) Biomagnification

(d) With regard to various food chains operating in an ecosystem, man is a :

    (a) Consumer                         (b) Producer

    (c) Producer and consumer   (d)  Producer and decomposer

 

 

 

 
 
 
 
 

Answers (1)

a) Humans are at the top of the food chain due to biomagnification and the concentration of dichlorodiphenyltrichloroethane (DDT) increases as on the tropic levels.

b) Instead of any synthetic pesticides, organic farming should be done and the use of biopesticides and organic pesticides should be increased.

c) Trophic level is the correct answer.

d) The consumer is the correct answer.

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Safeer PP

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