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3.1 Communicable diseases

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Question 6

A technician wants to test whether direct contact between leaves affects the spread of tobacco mosaic virus (TMV) between tomato plants.

The technician has healthy tomato plants and tomato plants infected with TMV. The investigation is carried out in a room that insects cannot enter.

a.

Give one variable, other than contact between leaves, that should be kept the same for all the plants.

[1]
b.

Plan how the technician could use the plants to carry out the investigation.

Include how the results should be used to reach a conclusion.

[3]
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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