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Which would be characterized by little rainfall,permafrost,and reindeer?
Countercurrent Exchange
Exchange of substances between two fluids moving in opposite directions.
Gill Capillaries
Small blood vessels within the gills of fish that facilitate the exchange of oxygen and carbon dioxide with water.
Concentration Gradient
The slow change in solute concentration within a solution from one area to another, often resulting in diffusion.
Atmospheric Pressure
The force per unit area exerted against a surface by the weight of the air above that surface in the atmosphere of Earth.
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