You decide to test the effects of Echinacea on 100 people who are experiencing similar cold symptoms. Which of the following groups would represent an appropriate control in your experiment?
A) One healthy person given Echinacea tablets
B) One sick person given Echinacea tablets
C) 100 healthy people given tablets similar to Echinacea but with no herb
D) 100 sick people given tablets similar to Echinacea but with no herb
D
You might also like to view...
Photosynthesis is the pathway used to synthesize carbohydrates from
A. sunlight. B. carbon dioxide. C. oxygen.
A group of interbreeding individuals occupying the same habitat at the same time is a(n)
A. species. B. guild. C. population. D. equilibrium. E. quadrat.
The first step in testing an hypothesis is to
a. perform an experiment. b. make a prediction. c. test a prediction. d. analyze data. e. report results.
Which of the following is NOT a characteristic of both DNA and RNA polymerases?
A) directionality of synthesis B) energy is provided by pyrophosphate C) hydrogen bonding of complementary nucleotides D) requirement for an initiation signal E) requirement for a primer