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The entry and exit of substances from cells occurs through the plasma membrane. The control of external and internal water balance is performed through the osmosis process. In osmosis, water moves according to solute concentrations: always from the lowest concentration to the highest concentration.
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I don’t know 22 but I think 21 is B
<span>observations are used in scientific study when conducting experiments to see</span>
Answer: wind, water, and gravity.
Explanation: