Why are correlations less convincing than controlled experimental results?
A) Correlations are subject to greater bias than experimental results.
B) Correlations cannot be observed outside the laboratory.
C) Correlations cannot be statistically significant.
D) Correlations do not eliminate as many alternative hypotheses.
D
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Which one of the following is NOT one of the general classes of macromolecules that are necessary for cellular function?
A. Nucleic acids B. Proteins C. Ions D. Carbohydrates E. Lipids
The anatomical structure identified with the letter
“H” in the figure above is the a. myocardium. b. pulmonary veins. c. inferior vena cava. d. right atrium. e. heart apex.
The tree in your backyard is home to two cardinals, a colony of ants, a wasp's nest, two squirrels, and millions of bacteria. Together, all of these organisms represent a(n)
A) species. B) community. C) population. D) ecosystem.
The presence of fungus in patient specimens can be detected by the ________ test
A) direct fluorescent antibody B) indirect fluorescent antibody C) hemagglutination D) complement fixation E) ELISA