It is MOST pertinent to determine if the symptoms of a diving-related emergency began:

A) at the time of water entry.
B) before entering the water.
C) after the diver surfaced.
D) during ascent or descent


Answer: D) during ascent or descent

Environmental & Atmospheric Sciences

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Organisms that dwell in dark caves, in wells, or on the ocean floor often depend on which of the following biogeochemical processes?

A) chemosynthesis B) endogenic processes C) nutrient leaching D) photosynthesis E) nitrogen fixation

Environmental & Atmospheric Sciences

Nitrogen oxide concentrations are typically most pronounced in

A) large metropolises with heavy combustion of coal for power. B) large metropolises with heavy automobile use. C) rural areas experiencing the burning of forests. D) rural areas with heavy combustion of coal for power.

Environmental & Atmospheric Sciences

Pesticides that break down quickly in the environment are called

A. persistent pesticides. B. nontarget pesticides. C. insecticides. D. nonpersistent pesticides.

Environmental & Atmospheric Sciences

Individuals represented by the middle of the dose/response curve (responding to doses of 20 ppm) are ________ for that population.

A. About average in sensitivity B. Relatively insensitive C. Very insensitive D. Very sensitive E. Relatively sensitive

Environmental & Atmospheric Sciences