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2.2 Animal tissues, organs and organ systems

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Question 50
F

Midwives recorded the birth mass of 900 babies. They put the babies into three groups, based on how much the mother smoked during pregnancy. The chart shows their results.

Figure: The mean birth mass of babies born to mothers who smoked different numbers of cigarettes a day during pregnancy

image

a.

Use the chart to give the mean birth mass of the babies born to mothers who smoked more than 10 cigarettes a day.

[1]
b.

Calculate the percentage decrease in mean birth mass between the babies of mothers who did not smoke and the babies of mothers who smoked more than 10 cigarettes a day.

[2]
c.

Explain why smoking during pregnancy reduces the birth mass of a baby.

[2]
Markscheme

2.2 Animal tissues, organs and organ systems Questions

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

179 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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