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What is cell

 All organisms are composed of cell. Some are composed of a single cell and are called unicellular organisms while others, like us, composed of many cells, are called multicellular organism .

unicellular organism are capable of (1) independent  existence and (2) performing the essential functions of life .

Anything less than a complete structure if a cell does not ensure independent living . Hence, cell is the fundamental structure and functional unit of all living organisms.
first cell was discovered by - ROBERT HOOKE in thin slice of cork.

Anton von Leeuwenhoek first saw and describe a living cell .
Robert Brown later discovered the nucleus .


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