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प्रश्न
What is cell theory? Name the three scientists whose work led to the formulation of the cell theory.
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उत्तर
Cell theory was given by Schleiden and Schwann in the year 1838-1839. It was refined further by Rudolf Virchow.
The main postulates of cell theory are:
- All living beings are made up of one or more cells.
- Cells are the basic structural and functional unit of all living beings.
- All cells are basically alike in chemical composition and metabolic processes.
- New cells arise by the division of pre-existing cells. (Rudolf Virchow)
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संबंधित प्रश्न
Who discovered cells and how?
What is osmosis?
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Name the part of the cell concerned with the following:
Hydrolytic in function
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Write true or false for each statement. Rewrite the false statements correctly:
The size of a cell is usually measured in centimetres
When will you use a simple microscope and when, a compound microscope? Explain in detail how you will use them.
Under the microscope, Priya observes a cell that has a cell wall and distinct nucleus. The cell that she observed is
Nerve cell is the longest cell
