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4.1 Ecosystems

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Question 1
F

The Figure shows part of the carbon cycle.

Figure

image

a.

Name process P.

[1]
b.

Name process T.

[1]
c.

Arrow S shows carbon dioxide being released from dead organisms and waste.

Explain the role of microorganisms in this part of the carbon cycle.

[2]
d.

Give one reason why the carbon cycle is important to living organisms.

[1]
Markscheme

4.1 Ecosystems Questions

  1. GCSE
  2. /Biology
  3. /4.1 Ecosystems

111 exam-style questions on OCR GCSE Biology 4.1 Ecosystems, covering 4.1.1 Cycling of materials in ecosystems, 4.1.2 Microorganisms in cycling materials, 4.1.3 The carbon and water cycles, 4.1.4 Factors affecting decomposition, 4.1.5 Levels of organisation in an ecosystem, 4.1.6 Abiotic and biotic factors affecting communities, 4.1.7 Interdependence and competition, 4.1.8 Trophic levels, 4.1.9 Pyramids of biomass, and 4.1.10 Efficiency of biomass transfers. Each one has a worked solution and a mark scheme showing where the marks go.

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