Read following paragraph carefully and answer the up-coming questions.
Bacteria and cyanobacteria are classified in a separate kingdom, the kingdom Monera. Bacteria range in size from 0.1 to 600µm over a single dimension. The smallest Bacteria is approximately the size of the largest viruses. In terms of shapes, there are three basic forms of bacteria.
1. Cocci: Cocci are spherical or round in form. They mostly occur in pairs.
2. Bacilli: They are rod-shaped bacteria. They mostly form colonies that look like threads or filaments.
3. Spirilla: Spirilla are spiral shaped bacteria. They seldom form colones.
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