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Ecosystem

Short Answer Type

41.

Sketch the following pyramids.
(i) Pyramid of number (ii) Pyramid of biomass. (iii) Pyramid of energy.

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42.

Construct a pyramid of biomass, starting with phytoplankton. Label three trophic levels. Is the pyramid upright or inverted? Why?

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43. Why is the pyramid of energy always upright ?

Pyramid of energy is always upright because when energy flows from a particular trophic level to the next trophic level, some energy is always lost as heat at each step. So the energy in the subsequent trophic levels is always less than the energy in the previous level.

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