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2.2 Animal tissues, organs and organ systems

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Question 31

Scientists want to estimate the incidence of a skin condition in the whole country. They record the incidence in 420 people who belong to one coastal swimming club. Which change would most improve the validity of their estimate?

[1]
A

Select 420 people from several regions and occupations

B

Select 42 people from several regions and occupations

C

Select 420 people from one other coastal swimming club

D

Select 420 people from the same club at a different time

Markscheme

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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