The fundamental unit of life Cell - 9th Class Science online notes

The fundamental unit of life Cell - 9th Class Science online notes

Class 9 Science Cell: A cell is capable of freelance existence and may do all the functions that square measure necessary for a living being, like nutrition, respiration, excretion, transportation and A cell may be a elementary unit of life since living thing organisms square measure capable of freelance existence that shows a cell’s ability to exist severally.

All living beings are composed of the fundamental unit of life, i.e. cell. Cell theory: projected by M. J. Schleiden, Schwann, and Rudolf Virchow, that states that

All living organisms are composed of one or more cells.

Shape and Size of Cells:-

• Cells come in all shapes and sizes.
• While most of the cells are spherical in shape, cells of various other shapes are also found.
• Most of the cells are microscopic in size, i.e. it is impossible to see them with naked eyes which can be seen through microscopic, since these microscopic organisms.

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