BSC 310 Lecture 4: 2.1-2.2 - Cell Morphology, Function of Size
18 Jan 2019
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Coccus (cocci, plural) = spherical or ovoid. Rod (or bacillus ) = cylindrical shape. Spirillum = rod twisted into a spiral shape. Cells of many species are often found in groups or clusters. The arrangement of cells in these clusters can be characteristic of certain genera. Forming clusters of cells that look like grapes (ex. Dividing in multiple planes to form 3d cubes of cells (ex. Morphology can be used to identify some cells (e. g. spirochetes, appendaged bacteria, These are representative shapes, but there are many variations on these. For example, a rod is de ned as a cell that is longer in one dimension than the other others unusual. Cell morphologies form a continuum, with some shapes being common and. Morphology typically does not predict physiology, ecology, or phylogeny of a cell. Selective forces are likely to be involved with determining the morphology of a cell. Regulates size and requires high surface-to-volume ratios.
