Q9 of 38 Page 106

Organisms of a higher trophic level which feed on several types of organisms belonging to a lower trophic level constitute the

An ecological Pyramid is a graphical representation which depicts productivity of the biomass at each trophic level. Organisms of higher trophic level feed on lower trophic level organisms and forms an Ecological pyramid.

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7

Organisms which synthesize carbohydrates from inorganic compounds using radiant energy are called

 8

In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of

 10

Flow of energy in an ecosystem is always

 11

Excessive exposure of humans to U V-rays results in

(i). damage to immune system


(ii). damage to lungs


(iii). skin cancer


(iv). peptic ulcers