On the basis of shapes, bacteria are grouped under how many categories?
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Bacteria are classified into 5 groups according to their basic shapes: spherical (cocci), rod (bacilli), spiral (spirilla), comma (vibrios) or corkscrew (spirochaetes).
abhishekdogra878:
But is ncert it is given "four"
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they are among smallest and oldest organisms on our planet and are found in generally four shapes 1.rod shaped(bacilli)
2.spherical (cocci)
3.curved(commas)
4.spiral (spirilla)
2.spherical (cocci)
3.curved(commas)
4.spiral (spirilla)
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