Consider a living plant cell in a living leaf that is not wilted. The pressure potential (?P) of such a cell ____ than that
in the fluids surrounding the cell.
a. is typically lower
b. varies widely from higher to lower
c. is typically higher
d. is typically about the same as
e. is typically less negative
ANSWER: c
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Sympathetic effects include
a. decreased heart rate. b. decreased salivation. c. narrowing of pupils. d. constriction of the airways. e. none of these
What characteristic relates to shifting of the foramen magnum from the base of the skull to a more anterior position?
a. changes in vision b. changes in teeth and jaws c. bipedalism d. changes in brain size and development e. behavioral changes
What do wax and testosterone have in common?
A) They are both proteins.
B) They are both steroids.
C) They are both lipids.
D) They are both hormones.
Which statement is not correct with regard to redox (oxidation-reduction) reactions?
A) A molecule is reduced if it loses electrons. B) A molecule is oxidized if it loses electrons. C) An electron donor is called a reducing agent. D) An electron acceptor is called an oxidizing agent. E) Oxidation and reduction always go together.