Root formation in stem cuttings can be improved by the application of ____
a. synthetic auxins
b. abscisic acid
c. salicylic acid
d. ethylene
e. gibberellin
ANSWER: a
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Sensory nerves communicate the strength of a stimulus by
a. the magnitude of the voltage change across the membrane during the action potential. b. the speed at which the action potentials are transmitted down the axon. c. the number of action potentials transmitted down the axon. d. a and b. e. a and c.
Which of the following changes will result in decreased blood flow to a tissue?
A. Decreased peripheral resistance B. Decreased vessel diameter C. Increased blood pressure D. Relaxation of precapillary sphincters E. Increased blood volume
Which of the following has a complex sort of sexual
reproduction called conjugation? a. ciliates b. Plasmodium c. trypanosomes d. slime molds e. euglenoids
Which phrase describes the mechanism that facilitates the passage of electrons between protein complexes in the mitochondrial inner membrane?
a. The oxidized electron carrier protein passes on the electron to FADH and becomes reduced. b. The reduced electron carrier protein passes on the electron to the next protein and becomes oxidized. c. The reduced electron carrier protein passes on the electron to FADH and becomes oxidized. d. The oxidized electron carrier protein passes o