Question

how do substance like co2 and water move in and out of the cell

Answer 1

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Here is your answer :--

Substances like CO2 and water move in and out of the cell by the process of Osmosis.
Osmosis is the passage of water from high concentration to low concentration through a semi permeable membrane.

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Answer 2

the substances like co2 and water move in and out of the by diffusion from the region of high concentration to low concentration. when the concentration of co2 and water is higher in external environment than that inside the cell, co2 and water moves inside the cell.