A population's density is calculated as the
A) area over which the population is distributed.
B) number of individuals within the population.
C) unit of area divided by the number of individuals.
D) number of individuals per unit area.
D
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Allosteric enzymes
A. may bind two substrates. B. are used to bind to other enzymes. C. have an additional binding site that is involved in regulating enzyme activity. D. are twice as fast as single-site enzymes. E. may bind two substrates AND are twice as fast as single-site enzymes.
An ecologist that studies groups of populations that occur together in one area is a(n)______
a. behavioral ecologist d. ecosystem ecologist b. population ecologist e. organismal ecologist c. community ecologist
Which of the following is the best description of an adaptation?
a. a trait that was beneficial to survival in the past b. a trait that is currently beneficial to survival c. a trait that will be beneficial in the future d. a trait that is of no advantage to survival e. an environmental change that selects for certain traits
A researcher tests the hypothesis that large, daily doses of vitamin C help protect against catching the common cold. What would be the best experimental and control group to test this hypothesis?
A. Experimental group: takes a large dose of vitamin C daily; Control group: takes nothing. B. Experimental group: takes a large, daily dose of vitamin C; Control group: takes a daily dose of a sugar pill disguised as vitamin C. C. Experimental group: takes a large dose of vitamin C daily; Control group: takes a large weekly dose of vitamin C. D. Experimental group: people with a cold are administered vitamin C daily; Control group: people without a cold are not administered vitamin C.