Why are some tropical waters unable to sustain life?
a. There is an addition of pollutants in many of these areas.
b. There is a low level of dissolved oxygen due to temperature.
c. There is a greater amount of carbon dioxide.
d. There are more conservative components in these waters.
ANS: B
Gases dissolve readily in cold waters. Tropical waters have lower saturation capabilities. The oxygen
concentrations in some tropical regions may not be able to sustain animals. This can be further affected
by the addition of pollutants from sewage. Information can be found in the section Gases Dissolve in
Seawater
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