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4.1 Ecosystems

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Question 32
H

Mistletoe is a plant with green leaves that grows on the branches of trees.

Its roots grow into the tree's xylem and take water and mineral ions from the tree.

Which statement describes the relationship between the mistletoe and the tree?

[1]
A

mutualism, because the mistletoe makes sugars that it passes to the tree

B

competition, because the mistletoe and tree compete for light from the Sun

C

predation, because the mistletoe kills the tree and then feeds on its tissues

D

parasitism, because the mistletoe benefits while the tree is harmed by it

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.

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