What is a precursor?
a. a substance that is recycled through the liver and intestines
b. a sign or symptom of a clinical vitamin deficiency disorder
c. a substance that is used to synthesize another compound
d. a conditionally essential vitamin
e. a sign or symptom of a subclinical vitamin deficiency disorder

In a study of a weight loss program, 40 subjects lost a mean of 3.0 lb after 12 months. does the weight loss program have practical significance? a. yes, because the weight loss program worked and the subjects lost a mean of 3.0 lb. b. no, because the mean weight loss of 3.0 lb after one year does not seem to justify the program. c. no, because the sample of 40 subjects was too small to determine if the program was useful. d. yes, because the mean weight loss of 3.0 lb after one year does seems to justify the program.

Which of the following is an argument against buying local fruits and vegetables?

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