Which group would be the most effective control subjects in a test of an experimental treatment?
A) The control group should be a different age or gender than the experimental subjects.
B) The control group should be given different doses of the experimental treatment.
C) The control group should be kept well informed of what treatment they are getting.
D) The control group should have characteristics very similar to the experimental subjects.
D
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Viruses are very effectively treated with antibiotics
Indicate whether this statement is true or false.
Defining features of the halobacteria include ________.
A. the production of methane B. absolute dependence on a high concentration of NaCl for growth C. absolute dependence on temperatures above 65ºC for growth D. absolute dependence on low pH conditions for growth
Which of the following BEST explains the findings that the nuclear DNA of house cats and African wild cats has a very high degree of similarity?
a) house cats and African wild cats are both members of the family felidae b) house cats and African wild cats share a recent common ancestor c) convergent molecular evolution has occurred d) divergent morphological evolution has occurred e) convergent morphological evolution has occurred
Drinking water supplies are routinely tested for the presence of
A) Giardia. B) Cryptosporidium. C) fecal coliforms. D) fecal viruses. E) Vibrio.