According to the pressure-flow hypothesis:a
water moves from an area of positive water potential to an area of negative water
potential.
b. the evaporative pull of transpiration produces tension at the top of the plant.
c. the flow of sugar is driven by a hydrostatic pressure gradient produced by water entering
the phloem.
d. pressure is created by the movement of water into the roots from the soil.
e. the column of water pulled up through the plant is unbroken due to cohesive and adhesive
properties.
C
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Imagine that a mutation occurs such that an insect lacks functional malpighian tubules. Predict the consequences for this creature.
A. There would be no consequences, as malphigian tubules are characteristic of earthworms, not insects. B. The ability to filter waste would be severely impaired. C. The ability to secrete waste would be severely impaired. D. The ability to maintain water and salt balance in the body would be severely impaired.
Euglenoids live in freshwater; a __________ rids
them of excess water. Fill in the blank(s) with the appropriate word(s).
The enzyme that catalyzes carboxylation during photosynthesis is called ________
Fill in the blank(s) with correct word
In the accompanying figure, which label designates the structures largely responsible for attracting potential
pollinators? a. 1 b. 3 c. 7 d. 8 e. 10