In facilitated diffusion, substances move into or out of cells down their concentration gradient through protein channels in the cell membrane. Simple diffusion and facilitated diffusion are similar in that both involve movement down the concentration gradient.
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Answer:
1 unit
Explanation:
Each tropic level gets 10% of the energy from the last level it consumed.
They are designed to help farmers of varying experience levels profitably and sustainably raise and sell meat, eggs, milk, and fiber with an emphasis on pasture-based systems.
From experiments that scientists did with bacteria and viruses
