Stomata control the movement of gases into and out of a leaf.Â
State two environmental conditions that would cause stomata to close.Â
Identify the cell that controls the opening and closing of stomata.
With the stomata closed, this offers some advantages and disadvantages to the plant.Â
Explain an advantage and a disadvantage to the plant when the stomata are closed.Â
Fig. 1 shows a single stoma and surrounding cells from a xerophytic plant. The sunken stoma has been labelled for you.
Fig. 1
Label two other adaptive features shown in Fig. 1 that help reduce transpiration.Â
[2]
Explain how one of these features shown in Fig. 1 helps to reduce water loss.Â
[1]
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