Biology 9700 · AS & A Level · Cells as the basic units of living organisms

Cells as the basic units of living organisms — practice question

Why was just $4\%$ of the sunlight’s energy able to be fixed by producers in photosynthesis?

  • AA lot of energy is lost as energy passes from one trophic level to the next in food chains.
  • BA lot of sunlight reflects off clouds, is absorbed by pond water or does not strike chloroplasts.
  • CSome energy passes from dead plants to decomposers such as bacteria and fungi.
  • DSome parts of plants are not eaten or cannot be digested by herbivores.

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