A-LevelBiologyTransport in plants9700/12 · Oct/Nov 2023 · Q251 Mark
The photomicrograph shows some xerophytic adaptations in leaf tissue. [Figure 25.1] Which row shows the correct functions for structures 1, 2 and 3?
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Areduces the water vapour concentration gradient between the inside and outside of the leaf: 1, 2 and 3, reduces evaporation from the epidermis of the leaf: 3 only, traps a layer of moist air: 2 only
Breduces the water vapour concentration gradient between the inside and outside of the leaf: 1 and 2 only, reduces evaporation from the epidermis of the leaf: 1, 2 and 3, traps a layer of moist air: 1 and 2
Creduces the water vapour concentration gradient between the inside and outside of the leaf: 1 only, reduces evaporation from the epidermis of the leaf: 2 and 3 only, traps a layer of moist air: 1 and 2
Dreduces the water vapour concentration gradient between the inside and outside of the leaf: 2 and 3 only, reduces evaporation from the epidermis of the leaf: 1 and 2 only, traps a layer of moist air: 1 only
✓ Correct answer
B: reduces the water vapour concentration gradient between the inside and outside of the leaf: 1 and 2 only, reduces evaporation from the epidermis of the leaf: 1, 2 and 3, traps a layer of moist air: 1 and 2
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