Skip to content

Course home

Question bank·4.1 Ecosystems
Sign up

4.1 Ecosystems

EasyMediumHard
123456789101112131415161718192021222324252627282930313233343536373839
Question 21

The diagram shows the energy trapped as biomass at each stage of a food chain:

phytoplankton (25 000 kJ)⟶zooplankton (2 500 kJ)⟶small fish (375 kJ)⟶large fish (45 kJ) \text{phytoplankton (25 000 kJ)} \longrightarrow \text{zooplankton (2 500 kJ)} \longrightarrow \text{small fish (375 kJ)} \longrightarrow \text{large fish (45 kJ)} phytoplankton (25 000 kJ)⟶zooplankton (2 500 kJ)⟶small fish (375 kJ)⟶large fish (45 kJ)

What is the percentage efficiency in the transfer of energy between the zooplankton and the small fish?

A

1.5%1.5\%1.5%

B

12%12\%12%

C

15%15\%15%

D

85%85\%85%

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.

More questions