Within a species, traits come in a Gives multiple forms of the same gene.
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A. Variation
B. Selection
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C. Adaptations
D. Fitness

Atemperature inversion can cause a warm air mass to move over a colder air mass. this traps the colder air mass and prevents surface air from rising. this may result in which of these? a) smog b) acid rain c) freezing rain d) a thunderstorm