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3.1 Communicable diseases

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Question 97
F

Tomato plants infected with tobacco mosaic virus grow more slowly than uninfected tomato plants. Which statement explains why?

[1]
A

The virus blocks the stomata, so less carbon dioxide enters the leaves

B

The virus blocks the xylem, so less water reaches the leaves of the plant

C

The discoloured leaves absorb less light, so less glucose is made for growth

D

The discoloured leaves lose more water, so the plant wilts and stops growing

Markscheme

3.1 Communicable diseases Questions

  1. GCSE
  2. /Biology
  3. /3.1 Communicable diseases

252 exam-style questions on AQA GCSE Biology 3.1 Communicable diseases, covering 3.1.1 Communicable (infectious) diseases, 3.1.2 Viral diseases, 3.1.3 Bacterial diseases, 3.1.4 Fungal diseases, 3.1.5 Protist diseases, 3.1.6 Human defence systems, 3.1.7 Vaccination, 3.1.8 Antibiotics and painkillers, and 3.1.9 Discovery and development of drugs. Each one has a worked solution and a mark scheme showing where the marks go.

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