UNIT 3 - NCERT
µm in diameter. Nerve cells are some of the longest cells. Cells also vary greatly in their shape. They may be disc-like, polygonal, columnar, cuboid, thread like, or even irregular. The shape of the cell may vary with the function they perform. 8.4 PROKARYOTIC CELLS The prokaryotic cells are represented by bacteria, blue-green algae,
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