The movement of water up the xylem of a plant
A) occurs as a result of the movement of sugars in the phloem.
B) occurs due to active transport.
C) requires cohesion but not adhesion.
D) requires no energy input from the plant.
D
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If it weren't for the greenhouse effect, Earth's average atmospheric temperature would be ____
A) below the freezing point of water B) a couple degrees cooler than it is today C) about the same as it is today D) above the boiling point of water
Very warm air is usually associated with
a. low pressure. b. no humidity. c. anticyclones. d. high density.
This map shows elevations of the water table beneath an area. Which way does the upper level of groundwater flow? Generally toward the
A. north. B. northwest. C. northeast. D. south.
The Appalachian Mountains of the eastern United States are thought to have once been joined with
mountains located in which other continental regions? What will be an ideal response?