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Question

Exchange of substances between a cell and its environment can occur through

A
osmosis
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B
diffusion
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C
active transport
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D
all of the above
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Solution

The correct option is D all of the above
Diffusion is the movement of molecules (solid, liquid, gas) from a region of higher concentration to a region of lower concentration till a level of equilibrium is reached.

Osmosis is the movement of solvent molecules (water) from lower solute concentration to a solution having higher solute concentration when the two solutions are separated by a semipermeable membrane.

Active transport is the movement of molecules against the concentration gradient by utilizing energy.

All these are the processes carried out by the cell in order to exchange substances with its environment.

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