Question
During what time of day is a plant at greatest risk for the formation of air bubbles in the xylem stream?
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The xylem stream is the pathway through which water and nutrients are transported from the roots to the rest of the plant. Show more…
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Stomata are usually open a. at night, when the plant requires a supply of oxygen. b. during the day, when the plant requires a supply of carbon dioxide. c. day or night if there is excess water in the soil. d. during the day, when transpiration occurs. e. Both b and d are correct.
The formation of an air bubble in the xylem is called a. agitation. c. adhesion. b. cohesion. d. cavitation.
When soil is dry, guard cells respond to _____________ by collapsing against one another, so stomata close. a. air temperature b. low humidity c. phloem d. xylem
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