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3.1 Communicable diseases

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Question 42
F

A scientist recorded the percentage of leaves with black spot on two groups of rose bushes over 10 weeks. One group was sprayed with a fungicide every 2 weeks. The other group was not sprayed.

Figure: The percentage of rose leaves with black spot over 10 weeks for sprayed and unsprayed rose bushes

image

a.

Describe the difference between the results for the sprayed bushes and the results for the unsprayed bushes. Use data from the figure in your answer.

[3]
b.

Some leaves on the sprayed bushes still developed black spot. Suggest one reason why.

[1]
Markscheme

3.1 Communicable diseases Questions

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

176 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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