Q1 of 14 Page 540

State one reason to justify the position of man at the apex of most food chains.

The position of man is at the apex of most food chains as he is an intelligent organism and can take any advantageous position by manipulation. Also, man can eat any food and thus can be positioned at apex.


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2

If a harmful chemical enters a food chain comprising snakes, hawks, mice and plants, which of these organisms is likely to have maximum concentration of the harmful chemicals in its body?

 3

Name the organisms belonging to the second and fourth trophic levels in the food chain comprising the following:

Frogs, Plants, Snakes, Hawks, Insects.

 4

What are the functions of an ecosystem?

 5

Give proper term for each of the following:

(a) Smaller constituent operational unit of biosphere.


(b) Accumulation of non-biodegradable toxic substance in the increasing order in a food chain.