According to the cohesion-tension mechanism of water transport, ____ does not contribute to the flow of the xylem
sap?
a. hydrogen bonding between water molecules
b. adhesion of water molecules to the xylem vessel walls
c. evaporation of water from the leaves
d. water potential in leaf cells below that of the leaf xylem
e. root pressure
ANSWER: e
You might also like to view...
Bacterial and archaeal ribosomes are known as ________ ribosomes, based on their sedimentation coefficient.
A. 50S B. 30S C. 70S D. 80S
What is the primary difference in how touch sensation and hearing sensation are conveyed?
A. the neurotransmitters secreted by the sensory neurons B. the way that the axons physically connect to the brain stem C. the shape of the sensory axons D. the proteins that transduce the chemical signal in the brain E. the part of the brain that receives the signal Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about sensory signaling? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Molting in crustaceans is controlled by
a. ecdysone. b. the X organ. c. MIH. d. the Y organ. e. all of these
The thick layers of cells covering and protecting the delicate apical meristem is called the:
a. root cap. b. root hairs. c. pericycle. d. adventitious root. e. radicle.