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Standard XII
Biology
What Are Ecological Pyramids
The given pyr...
Question

The given pyramid of biomass represents different trophic levels in a terrestrial ecosystem. The producers are represented by level
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A
1
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B
2
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C
3
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D
4
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E
5
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Solution

The correct option is C 5
Pyramid of biomass is the graphical representation to determine the total living material present at each trophic level. Since there is 90% reduction in biomass at each trophic level, producers exhibit maximum biomass in a terrestrial ecosystem. In given pyramid, producers are represented by level 5 exhibiting maximum biomass. Thus, the correct answer is E.

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Q. The pyramid of biomass represents the relationships that exist between the quantity of living matter (biomass) at different trophic level. In the terrestrial ecosystem, the biomass progressively decreases from producers to top carnivores.
What does the biomass pyramid represents?
Q. The pyramid of biomass represents the relationships that exist between the quantity of living matter (biomass) at different trophic level. In the terrestrial ecosystem, the biomass progressively decreases from producers to top carnivores.
In which ecosystem the biomass progressively decreases form producers to top carnivores?
Q. An ecological pyramid shows the relationship of biomass, productivity or energy at different trophic levels. Consider the following statements about ecological pyramidsWhich of the above statement(s) is/are NOT correct?
  1. Only 1 & 2
  2. Only 2 & 3
  3. Only 1 &3
  4. None of these
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.

Q. The diagram above shows an ecological pyramid of net productivity that describes the multiplicative loss of energy in a food chain. Each trophic level in the food chain is represented by a bar in the pyramid, with primary producers forming the foundation of the pyramid. The size of each block represents the productivity at each trophic level per unit of time.
In the above example, approximately how much energy available in each trophic level is converted into new biomass in the trophic level above it?
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