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2 ppm of a pesticide entered in a food c...

2 ppm of a pesticide entered in a food chain at the producer level. However, in the apex consumers, 200 ppm of pesticide was identified. The phenomenon that occurred here is :

A

Biodeterioration

B

Eutrophication

C

Biogeochemical cycling

D

Biomagnification

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The correct Answer is:
D
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A food chain consists of fish, larvae , phytoplanktons and birds. The level of pesticides in water in which the fish, larvae and phytoplanktons live is quite high. (a) In which organisms the pesticides enter from the polluted water ? What is the level of organisms known as ? (b) Which organism will have the maximum amount of pesticides accumulated through the food chain ? What is this process known as ? (c) Write the food chain comprising all the organisms mentioned above. (d) Which other organism you could write in place of bird in the above food chain ?

Define a food chain. Design a terrestrial food chain of four trophic levels. If a pollutant enters at the producer level, the organisms of which trophic level will have the maximum concentration of the pollutant in their bodies ? What is this phenomenon called ?

The surface of water in a lake appears green due to a layer of tiny free-floating organisms X on its surface. The lake water also contains organisms like water beetle, fish and tadpole. The sun shines over the lake water and provides energy for the functioning of this lake ecosystem. (a) What could organisms X be ? (b) Write a food chain comprising of all the four organisms metioned. (c) What is the general name of the food chains like the one written above ? (d) Name (i) secondary consumer (ii) producer (iii) tertiary consumer, and (iv) primary consumer, in the above food chain. (e) If the tertiary consumer gets 0.2 J of energy from the secondary consumer, then how much energy was radiated by the sun to the producer ?

Drinking of mineral water with very low levels of pesticides (about 0.02 ppm) for long periods may:

If the energy available at the producer level in a food chain is 150 J, how much energy will be transferred to : tertiary consumer ?

NTA MOCK TESTS-NTA NEET SET 108-BIOLOGY
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