Which one of the following is not used for construction of ecological pyramids? from Biology Ecosystem Class 12 Nagaland Board
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Class 10 Class 12

Which one of the following is not used for construction of ecological pyramids?

  • Dry weight

  • Number of individuals

  • Rate of energy flow

  • Fresh weight


D.

Fresh weight

Ecological pyramids are the graphical representation of the trophic structure and function at successive trophic levels. Ecological pyramids are of three general types, listed as here under:
(i) Pyramid of numbers, showing the number of organisms at each level.
(ii) Pyramid of biomass, showing the total dry weight of living matter.
(iii) Pyramid of energy, showing the rate of energy flow/productivity at successive trophic levels.
Thus, fresh weight is not used for the construction of ecological pyramids.

Ecological pyramids are the graphical representation of the trophic structure and function at successive trophic levels. Ecological pyramids are of three general types, listed as here under:
(i) Pyramid of numbers, showing the number of organisms at each level.
(ii) Pyramid of biomass, showing the total dry weight of living matter.
(iii) Pyramid of energy, showing the rate of energy flow/productivity at successive trophic levels.
Thus, fresh weight is not used for the construction of ecological pyramids.

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The green plants in the ecosystem-terminology are called :
  • Producers
  • Consumers
  • Herbivores
  • Carnivores

A.

Producers
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Cockroaches can feed both on plant and animal food, they are called :
  • Herbivores
  • Carnivores
  • Omnivores
  • None of the above

C.

Omnivores
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What trophic level is occupied by the birds in an ecosystem ?
  • First
  • Second
  • Third
  • Fourth

C.

Third
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What trophic level is occupied by the Phytoplankton in an ecosystem ?
  • First
  • Second
  • Third
  • Fourth

A.

First
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The animals that feed on plants are called :
  • Producers 
  • Carnivores
  • Insectivores
  • Herbivores

D.

Herbivores
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