Q1 of 38 Page 106

Which one of the following is an artificial ecosystem?

Since artificial ecosystems are those ecosystems which are created by human and are not natural. Pond, Lake and Forest are natural ecosystem but Crop field is a man-made ecosystem and is therefore, crop field is an artificial ecosystem.

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2

In a food chain, the third trophic level is always occupied by

 3

An ecosystem includes

 4

In the given food chain, suppose the amount of energy at fourth trophic level is 5 kJ, what will be the energy available at the producer level?
Grass → Grasshopper → Frog → Snake → Hawk

 5

Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as