The therapeutic index is calculated using what equation
A. Toxic dose divided by therapeutic dose
B. Toxic dose multiplied by therapeutic dose
C. Therapeutic dose multiplied by toxic dose
D. Therapeutic dose divided by toxic dose
A. Toxic dose divided by therapeutic dose
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Biological magnification can be defined as the:
a. concentration of a chemical in organisms increasing as the pollutant moves up a food chain b. energy transfer increasing as it moves up a food chain c. fixation of nutrients from the atmosphere d. entrance into the biological portion of a biogeochemical cycle e. increase in food web members in biologically diverse ecosystems
Which of the following pairs is incorrectly
matched?
a. bran-seed coat b. germ-embryo c. starch-endosperm d. all of these (a through c) are correctly matched e. all of these (a through c) are incorrectly matched
Plant tissue noted for storage, secretion, and
regeneration is
a. vascular cambium. b. parenchyma. c. collenchyma. d. sclerenchyma. e. none of these
Transfer of random pieces of DNA mediated by phage is known as
A. transformation of competent cells. B. generalized transduction. C. conjugation. D. transposition. E. specialized transduction.