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Feeding relationships

Feeding relationships

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Question 12
a.

Explain what is meant by the term trophic level.

[1]
b.

A biologist collected data from a grassland ecosystem:

  • Number of clover plants = 600
  • Number of thrushes that feed on the snails = 18
  • Number of snails that feed on the clover = 120
  • Number of owls that feed on thrushes = 2

Draw and label a pyramid of numbers for this data.

[3]
c.

The biologist collected this data during the summer months. Suggest why the number of snails might be different during the winter.

[2]
d.

The total biomass of the organisms at each trophic level decreases as you move up the pyramid. Explain why.

[4]
Markscheme

Feeding relationships Questions

  1. IGCSE
  2. /Biology
  3. /Feeding relationships

20 exam-style questions on Edexcel IGCSE Biology Feeding relationships. Each one has a worked solution and a mark scheme showing where the marks go.

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