Why is the random assignment of individuals to experimental and control groups important for an experiment?
A) It ensures that bias has been completely eliminated from the experiment.
B) It ensures that the results of the experiment will be statistically significant.
C) It ensures that the sampling error will have no effect on the results of the experiment.
D) It ensures that each group will better represent the population as a whole.
D
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Which is involved in reacting to virus-infected cells?
A. Cell-mediated immunity B. T cytotoxic cells C. B cells D. MHC I E. Cell-mediated immunity, T cytotoxic cells, AND MHC I
Ribosomes are the structures in the cell that produce
A. steroids. B. lipids. C. glucose. D. starches. E. proteins.
If you go to the refrigerator and reach in to take out a drink, you will not normally fall over because of this part of the brain
A) pons B) choroid plexus C) cerebellum D) amygdala
Several species of Caribbean Anoline lizards have evolved from a single ancestral species. The species occupies a wide variety of ecological niches, such as tree trunks and the ground, or tree trunks only, or tree trunks and the crown of trees, etc. This type of allopatric speciation is called
A. adaptive radiation. B. hybridization. C. alloploidy. D. autoploidy.