In an experiment the subjects or items being investigated are divided into the experimental group and
(a) the nonexperimental group.
(b) the control group.
(c) the statistics group.
(d) none of these choices.
(b) the control group.
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What is the main difference between a disturbance and a disturbance regime?
A) A disturbance regime includes defining the predictable frequency and severity of the disturbance. B) A disturbance regime includes defining the length of the disturbance. C) A disturbance regime is a more specific type of disturbance. D) They are essentially the same thing.
Four of the five features listed below are found in the
same animal. Select the exception. a. first segmented form b. possess nephridia c. jointed appendages d. clitellum e. complete gut with closed circulatory system and coelom
Which of the following describes the composition of a nucleotide?
a. a five-carbon sugar, a phosphate group, and one of four amino acids b. a five-carbon sugar, a nitrogenous base, and one of twenty amino acids c. a five-carbon sugar, a phosphate group, and one of four nitrogenous bases d. a six-carbon sugar, a phosphate group, and one of twenty amino acids
Some complement proteins
A) induce antibody formation by phagocytic cells. B) help trigger the inflammatory response. C) are released by natural killer cells to attack cancer and virus-infected cells. D) replace T cells in the cell-mediated response.