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→Concept Bacteria
'''Size of bacteria:'''
'''Size of bacteria:'''
Thirty trillion bacteria of average size weigh about 28 g (1 oz). Bacteria are measured in microns (0.001 micrometer, about 0.00004 in) and most types range from 0.1 to 4.0 microns in width and 0.2 to 50 microns in length.
Thirty trillion bacteria of average size weigh about 28 g (1 oz). Bacteria are measured in microns (0.001 micrometer, about 0.00004 in) and most types range from 0.1 to 4.0 microns in width and 0.2 to 50 microns in length.
2. '''Classification of bacteria on the basis of shapes:'''<br>
Content: Teaching Outlines.<br>
Bacteria are neither plant nor animal. Both bacteria and plants have rigid cell walls, but unlike plants, <br>most kinds of bacteria move about and use organic foods for energy and growth; only a few use photosynthesis.<br>
On the basis of their shapes,bacteria may be grouped into three main type;
===Learning objectives===
===Learning objectives===