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9.1 Ecosystems and interdependence

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Question 16

In a stream, mayfly larvae feed on algae and trout feed on mayfly larvae. A pollutant kills many mayfly larvae.

Which sequence is most likely?

[1]
A

more algae eaten, more algae, less food for trout

B

less algae eaten, fewer algae, more food for trout

C

more algae eaten, fewer algae, more food for trout

D

less algae eaten, more algae, less food for trout

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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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