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NEETBotanyEcosystem

Read the given statement and select the correct option to fill in the blanks. In a lake ecosystem, the pyramid of energy is ___(A)___ and the pyramid of biomass is ___(B)___.

Options

  1. A(A) Upright, (B) Upright
  2. B(A) Inverted, (B) Upright
  3. C(A) Inverted, (B) Inverted
  4. D(A) Upright, (B) Inverted

Correct answer

D. (A) Upright, (B) Inverted

Step-by-step solution

The pyramid of energy is universally upright in all ecosystems because energy is lost as heat at each successive trophic level according to the 10 percent law. Therefore, (A) is Upright. The pyramid of biomass in a lake or aquatic ecosystem is generally inverted because the standing crop biomass of the consumers (fishes, zooplankton) far exceeds that of the producers (phytoplankton) due to the producers' high turnover rate. Therefore, (B) is Inverted. Answer: (A) Upright, (B) Inverted

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