diffusion is process resulting from random motion of molecules by which there is a net flow of matter from a region of high concentration to a region of low concentration.
Explanation:
A familiar example is the perfume of a flower that quickly permeates the still air of a room. ion diffusion across a semipermeable membrane.
“Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration down the concentration gradient.”
Diffusion is the process of movement of molecules under a concentration gradient. It is an important process occurring in all living beings. Diffusion helps in the movement of substances in and out of the cells. The molecules move from a region of higher concentration to a region of lower concentration until the concentration becomes equal throughout.
Liquid and gases undergo diffusion as the molecules are able to move randomly.
Example:
Take water in a beaker. Add a few copper sulfate crystals in one place and leave it as it is for some time without disturbing it. After some time we can see that the beaker contains a uniformly coloured solution. Here, both water and copper sulfate diffuse independently. With this experiment, we can infer that solutes move from a higher concentration to a lower concentration in a solution.
Answer: Prokaryotes lack an organized nucleus and other membrane-bound organelles. Prokaryotic DNA is found during a central a part of the cell called the nucleoid. The plasma membrane of a prokaryote acts as an additional layer of protection, helps maintain cell shape, and prevents dehydration.
The bias conditions that must be present for the normal operation of a
transistor amplifier will be those in which the emitter-base junction is
forward biased, and the collector-base junction will be reverse biased. <span />
