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transport moves substances from an area of high concentration to an area of low concentration.

PASSIVE transport moves substances from an area of high concentration to an area of low concentration.

Explanation:

There are four main form of passive transport through the membranes: simple diffusion, facilitated diffusion, filtration, and osmosis.

a. they are both space stations

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why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.