Subject Experts Solutions for Exercise 3: NCERT EXEMPLAR PROBLEMS

The direction of the pyramid of number is 

Approximately how much of the solar energy that falls on the leaves of a plant is converted to chemical energy by photosynthesis?

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Where do you think the process of decomposition would be the fastest?
 

How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores?

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If the carbon atoms fixed by producers already have passed through three species, the trophic level of the last species would be
 

Which of the following types of ecosystem is expected in an area where evaporation exceeds precipitation, and mean annual rainfall is below $100 \mathrm{mm}?$

The zone at the edge of a lake or ocean which is alternatively exposed to air and immersed in water is called

Edaphic factor refers to