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Bacteria come in many shapes-round, rod, comma, spiral and even square! When in multiple linked colonies they can also take up a variety of shapes.Typically these can be clusters, chains, cubic packets, squares and grape-like bunched clusters. 1999 The Centre for Microscopy and Microanalysis. Bacteria come in many shapes-round, rod, comma, spiral and even square! When in multiple linked colonies they can also take up a variety of shapes. Typically these can be clusters, chains, cubic packets, squares and grape-like bunched clusters.
Bacteria: Bacilli, Spirilla and Cocci. The spiral bacteria are spirilla (singular form is spirillus) and the rod-shaped bacteria are bacilli (singular form is bacillus). The coccus (plural form is cocci) bacteria are spherical and are usually found in clusters or chains. Bacilli have a large surface area that helps them take in nutrients, but they may dry out easily.