Question

define active and passive processes

Answer 1

Active and passive transport are biological processes that move oxygen, water and nutrients into cells and remove waste products. Active transport requires chemical energy because it is the movement of biochemicals from areas of lower concentration to areas of higher concentration.

Passive transport is the cellular process of moving molecules and other substances across membranes. Passive transport differs from active transport in that it does not involve any chemical energy. Rather, passive transport relies on the innate permeability of the cell membrane and its component proteins and lipids.

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Answer 2

let me be very simple and precise

active process requires energy and is against the flow of gradient, whereas passive process does not require energy and it occurs with the flow or concentration of gradient.