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2.2 Animal tissues, organs and organ systems

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Question 40

Scientists recorded the number of new cases of lung cancer per 100 000 people per year in groups with different smoking habits.

Smoking habitNew cases of lung cancer per 100 000 people per year
Does not smoke12
Smokes fewer than 10 cigarettes per day45
Smokes 10–19 cigarettes per day115
Smokes 20 or more cigarettes per day220

Explain what the data show and what further evidence would be needed to establish that smoking causes lung cancer.

[3]
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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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