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9.1 Ecosystems and interdependence

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Question 11

In a coastal community, crabs feed on mussels and octopuses feed on crabs. The octopus population falls sharply.

Which sequence is most likely?

[1]
A

less predation of crabs, more crabs, more mussels eaten

B

more predation of crabs, fewer crabs, more mussels eaten

C

less predation of crabs, fewer crabs, fewer mussels eaten

D

more predation of crabs, more crabs, fewer mussels eaten

Markscheme

9.1 Ecosystems and interdependence Questions

  1. GCSE
  2. /Biology
  3. /9.1 Ecosystems and interdependence

82 exam-style questions on Edexcel GCSE Biology 9.1 Ecosystems and interdependence, covering 9.1.1 Levels of organisation in ecosystems, 9.1.2 Abiotic and biotic factors, 9.1.3 Importance of interdependence, 9.1.4 Parasitism and mutualism, and 9.1.5 Determining number of organisms in an area. Each one has a worked solution and a mark scheme showing where the marks go.

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