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4.1 Ecosystems

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Question 25

The table below shows anatomical data for three mammalian species:

SpeciesEye size (mm)Body mass (g)Eye size : body mass ratio
Human24720001:3000
Tarsier16128
Domestic Cat2142001:200
a.

Calculate the eye size : body mass ratio for the tarsier. Give your answer in the form 1:N1:N1:N.

[2]
b.

Tarsiers are nocturnal primates. Explain how their eye size : body mass ratio makes them adapted to hunt at night.

[2]
Markscheme

4.1 Ecosystems Questions

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

67 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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