The enzyme reverse transcriptase was discovered by ________.
A. Boyer and Cohen
B. Temin and Baltimore
C. Jackson, Symons, and Berg
D. Arber and Smith
Answer: B
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The body of arthropods includes
(a) a head. (b) a thorax. (c) an abdomen. (d) all of the above.
Which bone of the axial skeleton is connected to the tongue?
a. vomer b. hyoid c. maxilla d. palatine
Organs are composed of tissues, which are composed of cells. This is an example of which characteristic of life?
A. Living things grow and develop B. Living things respond to stimuli C. Living things maintain themselves by homeostasis. D. Living things have levels of hierarchical organization. E. Living things are adapted to the environment.
Which of the following represents a double-blind study?
A) The test group knows whether they are receiving a placebo or the actual treatment, and so do the researchers. B) The test group does not know whether they are receiving a placebo or the actual treatment, but the researchers do. C) The test group knows whether they are receiving a placebo or the actual treatment, but the researchers do not know until all the data are collected. D) Neither the test group nor the researchers know whether the test group is receiving a placebo or the actual treatment until all the data are collected.