what is the what is cell
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a cell is a basic fundamental structural unit of life
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Cell is the structural and functional unit of life.
Robert Hooke discovered the cell in 1665.
He prepared a thin slice of cork and observe it under self made microscope. He saw some boxes like structure which he named cell.
Because...
→ A living cell can perform all life functions with the help of it's component. Therefore cell is called functional unit of life.
→ All living organisms are made of cell. That's why structural unit of life.
→ Cells are structural and functional unit of life.
→ Cells size ranges from 1 to 100 micrometer.
→ Cells can replicate independently.
→ It contains hereditary information due to presence of nucleus and nucleoid.
→ Cells are of two types :
°
1) They are generally small in size.
2) Nuclear region is not well developed and don't surrounded by a nuclear membrane known as nucleoid.
3) Single chromosome is present in it.
4) Membrane bound cell organelles are absent.
5) Example - Bacteria, Blue green algae etc.
°
1) They are generally large in size.
2) Nuclear region well developed and surrounded by a nuclear membrane.
3) More than one chromosome is present in it.
4) Membrane bound cell organelles present.
5) Example - Humans, plants etc.
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