Our Enviroment

Que 1. Select the mis – matched pair in the following and correct it.

(a) Biomagnification – Accumulation of chemicals at the successive trophic levels of a food   chain

(b) Ecosystem – Biotic components of environment

(c) Aquarium – A man-made ecosystem

(d) Parasites – Organisms which obtain food from other living organisms

Ans. (b) is not a matching pair.

Both biotic and abiotic components of environment constitute an ecosystem.

Que 2. In the given figure, the various trophic levels are shown in a pyramid.

At which trophic level is maximum energy available?

            

Ans. At T, maximum energy is available because it comprises of the producers.

Que 3. What will be the direction of energy transfer in each of the following cases?

(a) Grasshopper is eaten by a frog.

(b) A deer feeds on grass.

(c) A deer is eaten by a lion

Ans. (a) primary consumer to secondary consumer.

(b) Producer to primary consumer.

(c) Secondary consumer to tertiary consumer.