Which of the following statement is not true?

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Food chains are generally short with few trophic levels as only 10% of the energy is transferred to higher trophic level from lower one.

The pyramid of biomass in the sea is generally inverted as the biomass of fish far exceeds that of phytoplankton.

Pyramid of energy is mostly upright but sometimes it may be inverted.

Pyramids of number and biomass may be either upright or inverted.

answer is C.

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Detailed Solution

Pyramid of energy is always upright because at every successive trophic level only 10% energy is transferred. Due to this reason number of trophic levels in any food chain is usually 3-4. Pyramid of biomass is always upright, except - In sea ecosystem, pyramid is inverted because biomass of fishes is comparatively more than producers (phytoplanktons). Pyramid of number is always upright, except - tree ecosystem where large tree is single but surviving organisms on it are comparatively more.

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