Question

24. Define diffusion. What is its simcance?​

Answer 1

Answer:

Diffusion is the tendency of molecules to spread out in order to occupy an available space. ... For example, oxygen can diffuse through cell membranes and if there is a higher concentration of oxygen outside the cell than inside, oxygen molecules diffuse into the cell.

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Answer 2

Answer:

Diffusion is the tendency of molecules to spread out in order to occupy available space.

eg. diffusion of oxygen and carbondioxide inside and out of stomata.

Explanation:

Diffusion is the process of movement of molecules from a region of higher concentration to a region of lower concentration.

Diffusion in Plants. Diffusion is a very important process for photosynthesis where carbon dioxide from the stomata diffuses into the leaves and finally into the cells.

you are also asking about its significance but for whom as many living beigns perform diffusion.

significance in humans

1.Transport across membranes

2.Diffusion is important to cells because it allows them to gain the useful substances they require to obtain energy and grow, and lets them get rid of waste products. {aplicable for all cells}

3.Diffusion HELPS IN THE EXCHANGE  of Carbon Dioxide and oxygen between blood and lung alveoli and vice versa.

hope it will help you.