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Biology - Foundation

Topic:

Ecosystems

Exam Board:

Eduqas

Subject Code:

C400F

Specification

Topic Details

  • 6.1 Levels of organisation within an ecosystem
  • 6.2 The principle of material cycling
  • 6.3 Biodiversity
  • 6.4 Some of the biological challenges of increasing food yields using fewer resources

For topic details, refer to pages 26 to 30 in the specification.

Levels of organisation within an ecosystem

Levels of organisation within an ecosystem - Trophic levels

The principle of material cycling

Biodiversity

Challenges of increasing food yields using fewer resources

Sample exam questions

(a) The diagram below shows a pyramid of biomass for the trophic levels of organisms in a habitat.

Many species of butterflies and other insects have declined considerably in the UK since 1950.

(a) (i) Calculate the number of alien species that are in Britain today.