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Study Quiz Section 9.2
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1

While the leaves of a plant are commonly known to be the most important organ for gas exchange, the cells along the stem also exchange gases. In woody plants, what are the lens-shaped openings along the bark called?
A)lenticels
B)Lentils
C)Stomata
D)Epidermis
2

When plants exchange gases during photosynthesis, they also loose valuable water from their leaves. What is this process of water loss called?
A)respiration
B)transpiration
C)condensation
D)evaporation
3

The guard cells of a plant open and close the stomata. How are the guard cells regulated?
A)by the amount of waste gases within the leaf
B)by the amount of water available—when there is no water, they are open and when there is water, they close.
C)by the amount of water available—when there is no water, they are closed and when there is water, they are open.
D)by the amount of oxygen available around the leaf
4

Which part of a plant provides much of the support in the plant?
A)the cell wall
B)water pressure
C)thick bark
D)vascular tissue





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