Study the following statements.
a) Trophic level represents functional level, not a species as such.
b) Pyramid of biomass, energy & number is upright in grassland ecosystem.
c) Pyramid of energy is always upright.
d) Pyramid of biomass represents standing crop.
Which of the above statements are correct?

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Only a and c

a, b, c, d

Only c and d

Only b and d

answer is D.

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Detailed Solution

Trophic level represents functional level, not a species as such. one of the hierarchical strata of a food web characterized by organisms which are the same number of steps removed from the primary producers.

Pyramid of biomass, energy & number is upright in grassland ecosystem.

Pyramid of energy is always upright. Ten percent law states that 10% of energy is transferred to the successive trophic levels in an unidirectional manner.

Pyramid of biomass represents standing crop. Each trophic level has a certain mass of living material at a particular time called as the standing crop.

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