Thursday 23 May 2024 – Morning
AS Level Biology B (Advancing Biology)
H022/02 Biology in depth
Time allowed: 1 hour 30 minutes
Turn over
, 2
1 The image below shows a transverse section of stem from a celery plant seen through a light
microscope.
Y
D
X
E
×120 magnification
(a)
(i) State the functions of tissues D and E.
D .......................................................................................................................................................
E .......................................................................................................................................................
[2]
Using only the equipment and materials supplied, plan a method to investigate how the
presence of leaves changes the rate of transpiration in celery stems.
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