Question

define Passive transport ????​

Answer 1

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$\huge\mathfrak\red{Answer :}$

Passive transport is a movement of ions and other atomic or molecular substances across cell membranes without need of energy input. Unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy.

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Answer 2

Hey mate here is your answer

The transport that occurs due to concentration gradient of materials and does not envolve energy is called passive transport. It is a slow method of movement.

Concentration means amout of substance dissolved.

hope it will help you