Q43 of 163 Page 242

What percentage of sun's energy falling on the leaves of green plants is utilized by the plants in the process of photosynthesis and stored as chemical energy of food?

Out of all the energy that falls on leaves of green plants, only one percent is utilized by plants to make food through photosynthesis, the rest is reflected back by the leaves.

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41

In the food chain given below, if the amount of energy available at fourth trophic level is 5 kJ, what was the energy available at the producer level?

GrassGrasshopper Frog Snake Hawk

 42

Which of the following limits the number of trophic levels in a food chain?

 44

The depletion of ozone layer in the upper atmosphere is mainly due to the emission of:

 45

In an ecosystem, the ten per cent energy available for transfer from one trophic level to the next is in the form of: