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7.4 Trophic levels in an ecosystem

7.4 Trophic levels in an ecosystem

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Question 12
F

Why does each bar of a pyramid of biomass usually get narrower towards the top?

[1]
A

Organisms at higher levels are always smaller in body size

B

Most of the biomass eaten at each level is used for growth

C

Organisms at higher levels need less food for each kilogram

D

Only about 10% of biomass passes to the level above

Markscheme

7.4 Trophic levels in an ecosystem Questions

  1. GCSE
  2. /Biology
  3. /7.4 Trophic levels in an ecosystem

61 exam-style questions on AQA GCSE Biology 7.4 Trophic levels in an ecosystem, covering 7.4.1 Trophic levels, 7.4.2 Pyramids of biomass, and 7.4.3 Transfer of biomass. Each one has a worked solution and a mark scheme showing where the marks go.

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