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  9. Q94

OPSC OCS 2024 · Question 94 of 99

Consider the following statements regarding ecological pyramids: In a parasitic food chain, the pyramid of numbers is always upright. Pyramids of biomass are always inverted in marine ecosystems. Pyramids of energy are never inverted. Which of the statements given above is/are correct?

Environment

  1. A1 only
  2. B2 and 3 onlyCorrect
  3. C1 and 3 only
  4. D1, 2 and 3

Answer: B. 2 and 3 only

Explanation

In parasitic food chains, the pyramid of numbers is not always upright ; it can be inverted depending on host-parasite ratios. Pyramids of biomass in marine ecosystems are often inverted because the biomass of producers (phytoplankton) is less than that of primary consumers…

Source: OPSC OCS Prelims 2024 GS Paper-I; answers per StudyIQ unofficial key

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