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biology 0610printed 35 · PDF 35
328 pagesrevision 46933
printed 35 · PDF 35
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Aitchison College Academic Resources.
Leaves are made of tissues.
(a) Define the term tissue.
Atissue is a group. of similar. cells. working
Fig. 4.1 is a photograph of a transverse section of a leaf, showing the upper and lower surfaces.
leaf hair
on upper
surface
stomata
A
leaf hair
on lower
surface
Fig. 4.1
(b) Name:
(i) tissue A
(ii) the process by which gases travel through the stomata.
Diffusion 9)