Channels, when they open, just allow the molecule to pass through. With a pump, it requires energy, and will move it in a certain direction. They move rapidly into the cell via protein molecules.
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Answer:
a
Explanation:
dark colors absorb more radiation.which causes them to heat up faster
Answer:
The reservoirs are the atmosphere, the terrestrial biosphere (which usually includes freshwater systems and non-living organic material, such as soil carbon), the oceans (which includes dissolved inorganic carbon and living and non-living marine biota), and the sediments (which includes fossil fuels).
Explanation:
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