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6. The cohesion-tension theory of water movement helps to explain how water moves from the soil into root?
A. Through the phloem
B. From leaf to root
C. Through the xylem
D. Into the guard cells
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7. When guard cells swell
A. stomata close
B. stomata open
C. photosynthesis stops
D. evaporation stops
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8. Water moves into roots of plants by
A. osmosis
B. active transport
C. diffusion
D. pressure flow mechanism
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