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7.4 Trophic levels in an ecosystem

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Question 4

A food chain in a coral reef ecosystem is:

algae → parrotfish → grouper → reef shark

A pyramid of biomass is constructed for this food chain.

Which organism should occupy the bottom bar of the pyramid of biomass?

[1]
A

The parrotfish.

B

The reef shark.

C

The algae.

D

The grouper.

Markscheme

7.4 Trophic levels in an ecosystem Questions

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

103 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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