An experimental condition applied to research subjects is called a
a) treatment
b) control
c) randomization
d) placebo
e) variable
Ans: a) treatment
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Our understanding of what drives atmospheric circulation and precipitation is based on
A. cooling of the land. B. rising masses of warm air, and sinking masses of cool air. C. CO2 production by trees. D. sea surface temperature. E. winds blowing off of the world's major mountain chains.
A scientific investigation follows an orderly progression of steps-select the correct path
a. Test hypothesis, collect and interpret data, determine conclusions. b. Make observations, formulate hypothesis, test hypothesis. c. Make observations, formulate hypothesis, test hypothesis, collect and interpret data, draw conclusion. d. Consult literature, test hypothesis, collect data, interpret data, draw conclusion. e. Make observations, consult literature, interpret data, formulate and test hypothesis.
In a Pacific kelp forest, which is a keystone species?
a. Giant kelp b. Sea otters c. Humans d. Sea urchins
Vibrio cholerae causes Asiatic cholera. It has a corkscrew shape, so we would say it has this form
A) coccus B) bacillus C) spirillum D) clostridia