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Ecological Pyramid

Which of the ...

Question

Which of the following statement is incorrect regarding ecological pyramids?

A

The pyramid of energy is inverted in ocean ecosystem.

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B

The pyramid of biomass is inverted in aquatic ecosystem.

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C

The pyramid of numbers is upright in a grassland ecosystem.

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D

The pyramid of biomass is upright in a grassland ecosystem.

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Solution

The correct option is A The pyramid of energy is inverted in ocean ecosystem.
The pyramid of energy is always upright irrespective of the type of ecosystem, because energy decreases from a lower trophic level to a higher trophic level. Pyramid of biomass and pyramid of number vary in structure depending on the type of ecosystem. For example, pyramid of biomass is inverted in an aquatic ecosystem but pyramid of biomass is upright in a terrestrial ecosystem.

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Statement-I : Pyramid of biomass is inverted for aquatic ecosystem
Statement-II : Ecological pyramids consider simple food chains

Q. Select the correct statements regarding the pyramids of ecosystem
(A) The pyramid of number of a tree ecosystem is inverted
(B) Pyramid of biomass in sea is inverted
(C) Pyramid of energy is mostly upright except in one special case
(D) Pyramids do not properly account the species belonging to two or more trophic levels

Q. An ecological pyramid of biomass is often an inverted pyramid in which of following ecosystem?

Q. Study the following ecological pyramids carefully. Match the following statements (i), (ii) and (iii) with given pyramids A, B and C and select the correct answer.
(i) Inverted pyramid of biomass depicting small standing crop of phytoplanktons supporting a large standing crop of zooplanktons.
(ii) Pyramid of numbers in a grassland ecosystem showing about

6

million producers.
(iii) Upright pyramid of biomass.

Q. Read the following statements regarding ecological pyramids and choose the correct answer.
(a) Relationship between organisms at different trophic levels is expressed in terms of number, biomass and energy.
(b) Any calculations of energy content, biomass or number has to include one group of organisms at that trophic level.
(c) In most ecosystems, all the pyramids of number, biomass and energy are upright.
(d) The pyramid of biomass in sea is generally inverted.
(e) Pyramid of energy is always inverted and can never be upright.

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