Question

With the help of example describe how cells vary in terms of shape ,size and a numbers

Answer 1

Nerve cell -long branched

Muscle cell-spindle shaped

Amoeba - irregular shape

Germ cell - cuboidal

Answer 2

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✶Variation in shape

The shape of a perticular cell depends on the specific function it performs.

Example- Muscle cell and nerve cell.

✶Variation in size

Cell size may vary from a micrometre to a few centimetres.

Example-The smallest cells are bacteria , which generally range in size from 0.1 to 0.5 micrometre. The largest cell is the egg of ostrich, which is 170 millimetre diameter.

✶Variation in number

Organisms may be composed of one cell or many cells.

Example- Amoeba and Human beings