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  • Cells are the basic structural and functional unit of life.

  • Cells differ in shape and size. These differences may be with in an organism and also from organism to organism.

  • Size and shape of a cell is determined by the specialized function it performs.

  • The number of cells in an organism decides its size. Greater the number, larger will be the size of the organism.

  • Basically, a cell has three major parts - Cell membrane, Nucleus and Cytoplasm.

  • Plant cells differ from animal cells in having plastids, cell wall, larger vacuoles and in not having centrioles.

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