Question

Notes
"Cells are the basic structural
units of living organisms. Explain.​

Answer 1

Answer:

A cell is the smallest unit of life and is capable of all living functions. Cells are the building blocks of life. This is the reason why cells are referred to as 'the basic structural and functional unit of life'. ... In fact, the shape and size of the cell is related to the specific function it performs.

Answer 2

The structural and functional unit of all organisms or living beings is called cell and the shape and size of the cell are different. The shape and size of cells are not only different for various organisms but the cells are also different different in the same organism of the different organs. Also unicellular organisms have different shape and size of their cells. The shape and size of the cells completely depend on the metabolic activities while their number depends on the size of the organs and the body of the organism. Thus smaller organism has limited cells, while larger organism like Elephant, Whale, Jack tree etc. have uncounted cells.

The cell was firstly invented by an English Scientist Robert Hook in 1665 and he asserted that cells has been made from a life saving substance. Later in 1939 J. E. Purkinje pointed out that this life saving substance is protoplasm which is the physical base of the life and in protoplasm nearly 80% water is to be found. Further protoplasm is also of two types - Cytoplasm and Nucleoplasm.

In the cell, Cytoplasm is confined inside the nucleus and the cell membrane, while Nucleoplasm is confined inside the nucleus. Thus protoplasm which exists, inside the nucleus of the cell is called Nucleoplasm.

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