The answer is (C) inside the cell membrane. The channels for facilitated diffusion aren’t outside, or else things still couldn’t get in, so the answer is not A. And it isn’t B because then things couldn’t get in from outside either. I am positive that the answer is inside the cell membrane. Have a lovely day
Answer:
As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level.
Explanation:
Thin air exerts less pressure than air at a lower altitude.
Answer:
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Explanation:
Examples of natural systems include: real number system, solar system, and planetary atmosphere circulation systems.
Natural physical systems include the solar system and an animal's digestive system. Human-made physical systems include mechanical systems, optical systems, electrical systems, and combinations of these. The names of these systems come from the type of energy they use.
