Multiple choice

Which of the following statements is true?

  1. The number of living organisms continuously decreases as we move up an ecological pyramid.

  2. The pyramid of biomass represents the biomass of an ecosystem.

  3. The pyramid showing the gain of energy at each higher step is the pyramid of energy.

  4. The number of plants will be less than the number of cows in an ecological pyramid.

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A Correct answer
Explanation

In ecological pyramids, the number of organisms decreases at each higher trophic level because energy is lost as heat during transfer. This creates a pyramid shape with many producers at the base, fewer herbivores above them, and even fewer carnivores at the top. The other options describe different pyramids or contain inaccuracies.

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