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NTA Abhyas NEET2020BotanyEcosystemPractice

Which of the following statement is not true?

Options

  1. AFood chains are generally short with few trophic levels as only 10% of the energy is transferred to higher tro
  2. BThe pyramid of biomass in the sea is generally inverted as the biomass of fish far exceeds that of phytoplankt
  3. CPyramid of energy is mostly upright but sometimes it may be inverted
  4. DPyramids of number and biomass may be either upright or inverted

Correct answer

C. Pyramid of energy is mostly upright but sometimes it may be inverted

Step-by-step solution

Pyramid of energy is always upright because at every successive trophic level only 10% energy is transferred. Due to this reason number of trophic levels in any food chain is usually 3 – 4 . Pyramid of biomass is always upright, except - In sea ecosystem, pyramid is inverted because biomass of fishes is comparatively more than producers (phytoplanktons). Pyramid of number is always upright, except - tree ecosystem where large tree is single but surviving organisms on it are comparatively more.

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