Q1. Define cell. Explain with the help of example, variation in shapes and sizes of cells. ( 8 marks question so plz give a long answer)
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cells are the basic building blocks of the living organism. A human body is composed with trillions of cell.
there two main types of cells
prokaryotic and eukaryotic
Prokaryotic : they have no nucleus, instead some prokaryotes like bacteria have a region within cell where genetic material is freely suspended.their size is 0.1 to 0.5nanometre
Eukaryotic:these are defined as true nucleus cells. their size is between the range of 10 to 100nanometre
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