Edexcel Gcse Biology/additional Science - Unit B2 The Components Of Life Page 9
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(b) The table shows the number of different
components found in the blood of a healthy
person and the blood of two other people.
NUMBER OF COMPONENTS
3
PER dm
OF BLOOD
COMPONENT OF
HEALTHY
PERSON A
PERSON B
BLOOD
PERSON
12
12
12
red blood cells
5 × 10
6 × 10
3 × 10
9
10
10
white blood cells
7 × 10
5 × 10
8 × 10
11
11
11
platelets
3 × 10
3 × 10
3 × 10
(i)
Calculate the difference in the number of
3
white blood cells per dm
of blood between
the healthy person and person A. (2 marks)
answer =
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