| (i) The relationship between organisms at different trophic levels is expressed in terms of number, biomass and energy. |
| (ii) Any calculations of energy content, biomass or number has to include one group of organism at that trophic level. |
| (iii) In most ecosystems, all the pyramids of number, biomass and energy are upright. |
| (iv) The pyramid of biomass in sea is generally inverted. |
| (v) Pyramid of energy is always inverted and can never be upright. |
A) (i), (iii) and (iv)
B) Only (i)
C) (ii) and (v)
D) (i) and (v)
Correct Answer: C
Solution :
[c] Any calculations of energy content, biomass, or numbers has to include all organisms at that trophic level. Pyramid of energy is always upright, can never be inverted, because when energy flows from a particular trophic level to the next trophic level, some energy is always lost as heat at each step.
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