Which of These Is LEAST Important in Determining the Level

question 90

Multiple Choice

Which of these is LEAST important in determining the level of air pollution from a particular source?

• A)stability of the air layer
• B)relative humidity at ground level
• C)height of stack used
• D)amount of turbulent mixing
• E)prevailing wind speed and direction

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Definitions:

Active Transport

The movement of molecules across a cell membrane from a lower to a higher concentration, requiring energy.

Mitochondria

Organelles within cells that are the sites of aerobic respiration, providing energy for cellular functions.

Concentration Gradient

A variation in the concentration of a substance across a distance, leading to the movement of particles from an area of high concentration to one of lower concentration.

Carrier Molecules

Proteins that facilitate the transport of substances across a cell membrane without modification of the transported substance.