12. The study of human health without using clinical trials, but instead looking for general patterns that occur within large populations is called _____

an epidemiological study
a controlled experiment
informed consent
deductive reasoning


an epidemiological study
Explanation: An epidemiological study looks for correlations between the variable of interest and its suspected effects on a large population. For example, one could look for a correlation between the levels of air pollution and the incidence of asthma in a given area.

Biology & Microbiology

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How does an enzyme work to catalyze a reaction?

A. It raises the temperature of a reaction. B. It lowers the activation energy of a reaction. C. It allows the reaction to proceed through different intermediates. D. It supplies the energy to speed up a reaction. E. It increases the concentration of the reactants in a reaction.

Biology & Microbiology

Enzymes work with at least three mechanisms. Which of the following is not a mechanism by which enzymes function?

a. putting reactants in close proximity to each other b. altering the free energy (?G) of the reaction c. altering the immediate environment of the reactants to promote reactant interactions d. orienting the reactants so they are positioned to favor the transition state

Biology & Microbiology

Fishes that are very active swimmers have a ____ body

a. fusiform b. laterally compressed c. globular d. flattened e. dorso-ventrally compressed

Biology & Microbiology

What is an example of the inefficient use rather than the waste of a catch? a. Dolphins as a tuna bycatch

b. Overfishing of large fish. c. Catching sharks for their fins only. d. Drift net bycatch.

Biology & Microbiology