Which of the following statements is not correct?

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Pyramid of energy is always upright.

Pyramid of numbers in a grassland ecosystem is upright.

Pyramid of biomass in sea is generally inverted.

Pyramid of biomass in sea is generally upright.

answer is C.

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Detailed Solution

The pyramid of biomass of an aquatic ecosystem is generally inverted since the standing crop of producers
(phytoplankton) can be quite small compared to the standing crop of primary consumers (zooplankton). This is because the high nutrient levels in the water support rapid growth of phytoplankton, but they also experience rapid turnover due to competition for nutrients and predation by zooplankton. As a result, the total biomass
of phytoplankton present at any given time can be relatively low, while the biomass of zooplankton can be high.

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