Q1 of 163 Page 240

What percentage of the solar energy is trapped and utilized by the plants?

1-2% of energy is trapped and used by the plant to make food. Rest of the 99-98% of solar energy that reaches the earth is reflected from surface of leaves and is absorbed by certain molecules which convert the energy into heat.


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80

Match the terms given in column I with the terms given in column II and column III having the same meaning:

 80

Give one example of a food chain having four organisms. Below each organism write the three appropriate terms from the part (a) above which you think it represents.

 2

What percentage of energy available at the producer level is transferred at successive trophic levels in a food chain?

 3

Name the process in which a harmful chemical enters the food chain and gets concentrated at each trophic level.