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Solution


Q.

In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of:
1 heat energy  
2 light energy  
3 mechanical energy  
4 chemical energy  

Ans.

(4)

The sun is the ultimate source of energy in an ecosystem, and green plants capture it and convert it to chemical energy, which is then stored in the form of carbohydrates. This chemical energy, in the form of food, is transmitted down the food chain in the ecosystem from one trophic level to the next following 10 per cent law according to which only 10% of the chemical energy is transferred from one trophic level to subsequent higher trophic level.