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6.1 Monitoring and maintaining the environment

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Question 25
F

Sea otters eat sea urchins. Sea urchins feed on kelp, a large seaweed.

Kelp forests provide a habitat for many species of fish.

Hunting caused the number of sea otters in an area to fall.

What happened to the biodiversity of the area?

[1]
A

Kelp numbers rose, because sea otters were no longer feeding on the kelp forest.

B

Sea urchin numbers fell, so more kelp grew and more fish species had a habitat.

C

Sea urchin numbers rose, so more kelp was eaten and fewer fish species had a habitat.

D

Fish numbers rose, because sea otters were no longer competing with fish for kelp.

Markscheme

6.1 Monitoring and maintaining the environment Questions

  1. GCSE
  2. /Biology
  3. /6.1 Monitoring and maintaining the environment

109 exam-style questions on OCR GCSE Biology 6.1 Monitoring and maintaining the environment, covering 6.1.1 Field investigation of distribution and abundance, 6.1.2 Human interactions and biodiversity, 6.1.3 Maintaining biodiversity, and 6.1.4 Environmental change and distribution of organisms. Each one has a worked solution and a mark scheme showing where the marks go.

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