Question

how the substances enter the cell​

Answer 1

Answer:

Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.

Answer 2

Through plasma membrane. This is a semipermiable membrane which allows only selected substenves inside

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