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2.2 Animal tissues, organs and organ systems

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Question 70

A school health team investigated disease R. Laboratory tests confirmed that it is caused by a bacterium. They recorded how many students in two groups were diagnosed with the disease:

GroupStudents in groupStudents diagnosed with disease R
Students who attended the same rehearsal249
Students who did not attend the rehearsal241

Explain what the results suggest about how disease R is transmitted.

[2]
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2.2 Animal tissues, organs and organ systems Questions

  1. GCSE
  2. /Biology
  3. /2.2 Animal tissues, organs and organ systems

304 exam-style questions on AQA GCSE Biology 2.2 Animal tissues, organs and organ systems, covering 2.2.1 The human digestive system, 2.2.2 The heart and blood vessels, 2.2.3 Blood, 2.2.4 Coronary heart disease: a non-communicable disease, 2.2.5 Health issues, 2.2.6 The effect of lifestyle on some non-communicable diseases, and 2.2.7 Cancer. Each one has a worked solution and a mark scheme showing where the marks go.

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