Xylem is composed of all of the following cell types except:a
tracheids.
b. vessel elements.
c. fibers.
d. parenchyma.
e. sieve tube elements
E
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The amount of energy available to do work is called
A. activation energy B. free energy C. kinetic energy D. potential energy
Viruses are characterized by all of the following except
A. being found in every organism investigated so far. B. being specific to the hosts they infect. C. being capable of independent reproduction. D. being acellular.
Which of the following is true of both xylem transport and phloem transport?
A. Both are passive processes that do not require energy from the plant B. Both involve only living cells C. Both rely on a gradient of water potential D. The direction of flow is usually reversible in both
If a frog egg cell is placed into a hypotonic solution, it will
A) shrivel via osmosis. B) shrivel via facilitated diffusion. C) swell via osmosis. D) swell via facilitated diffusion. E) shrivel via active transport.