Question

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Answer 1

Answer:

1. They move through  the process of diffusion

2. Because it allows the movement of only selective particles through it

Explanation:

Answer 2

Substances like CO2 move in and out of the cell through the process known as diffusion. In diffusion a substance moves from an area of high concentration to an area of low concentration.

         Substances like water move in and out of the cell through the process known as osmosis.In osmosis, water molecules move in and out of the cell through a semi-permeable membrane.

Plasma membrane is also called a selectively permeable membrane as it allows only the movement of some materials inside and outside the cell.

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