The cochlea _____. I) amplifies sound vibrations II) collects sound pressure waves III) detects the frequency of sounds
A) only I
B) only II
C) only III
D) only II and III
D
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The enzyme that has the ability to synthesize DNA from ribonucleic acid (RNA) is called:
a. DNA polymerase. b. RNAse. c. helicase. d. reverse transcriptase.
The zone size obtained in the Kirby-Bauer test is influenced by the drug's
A. size. B. stability. C. concentration. D. All of the choices are correct.
Why is it believed that life cannot evolve on a planet that orbits a spectral type A, B, or O star?
a. These stars produce too much infrared radiation which would destroy carbon-based organisms. b. These stars have very small life zones. c. These stars are not capable of producing planets. d. These stars do not remain on the main sequence long enough for life to evolve. e. These stars take too long to form.
If the probability of X occurring is 1 in 4, and the probability of Y occurring is 1 in 5, the probability
of both occurring is
a. (1/4)2 + (1/5)2 = (1/16) + (1/25) = (25/400) + (16/400) = 41/400. b. (1/4) + (1/5) = (5/20) + (4/20) = 9/20. c. (1/4)2(1/5)2 = (1/16)(1/25) = 1/400. d. (1/4)(1/5) = 1/20. e. (1/4 + 1/5)2 = (5/20 + 4/20)2 = (9/20)2 = 81/400.