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NTA Abhyas NEET2020BotanyEcosystemPractice

Which of these Eltonian pyramids are correctly described?

Options

  1. APyramid of numbers- may be erect or inverted, Pyramid of biomass- may be erect or inverted, Pyramid of energy-
  2. BPyramid of numbers- always erect, Pyramid of biomass- may be erect or inverted, Pyramid of energy- may be erec
  3. CPyramid of numbers- may be erect or inverted, Pyramid of biomass- always erect, Pyramid of energy- may be erec
  4. DPyramid of numbers- may be erect or inverted, Pyramid of biomass- may be erect or inverted, Pyramid of energy-

Correct answer

D. Pyramid of numbers- may be erect or inverted, Pyramid of biomass- may be erect or inverted, Pyramid of energy-

Step-by-step solution

Energy keeps on decreasing in successive trophic levels. Hence, producers will have maximum energy while top carnivore will have the least energy. Hence, the pyramid of energy is always erect and never inverted. Pyramids of numbers and biomass may be upright or inverted.

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