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biology 0610printed 106 · PDF 106
328 pagesrevision 46933
printed 106 · PDF 106
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The diagram shows a cross-section through a plant stem.
G
8
2
Q shows the part that is stained red when the stem is placed in water containing a red dye.
What is found at Q?
A
B
Cc
D
guard cells
palisade cells
phloem
xylem
The graph shows how the rate of transpiration is affected by X.
ry
rate of
transpiration
>
»4
What is X?
A humidity
B light intensity
C soil moisture
D_ temperature