Study the picture given below showing three food chains (a), (b) and (c) and answer the following questions…

Study the picture given below showing three food chains (a), (b) and (c) and answer the following questions : (i) Name the type of ecosystems that exist in food chains (b) and (c). (ii) The first trophic level in all food chains are producers. Why ? What percentage of solar energy do these producers capture for their use ? (iii) Why are the arrows shown in the diagram in one direction only and not vice versa ? Justify. Figure

Solution

(i) Terrestrial /Grassland / cropland Aquatic /Pond (ii) First trophic level are always producers or autotrophs as they can capture the solar energy and convert it into chemical energy. 1% energy is captured. (iii) Because energy flows in one direction only. Justification: when energy passes from one trophic level to other it cannot revert back.

Asked in: CBSE

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