Bacteria
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Standard Cyclopedia of Horticulture |
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Unicellular or filamentous organisms without green color, possibly "degenerated" from the Cyanophyceae, with no true nucleus, the cell-wall often gelatinous: reproduction wholly asexual by division into two equal portions and subsequent separation (fission); or by asexual spores, one of which may be produced in each cell. Bacteria are probably the smallest known organisms, some being not over .00003 inch in diameter. In form, the cells are either oblong, spherical or spiral, and may be separate or united in groups or chains, and may be either motile by means of cilia or non-motile. Bacteria, while showing little structural diversity, have become highly specialized physiologically, and it is on this basis that the species are usually distinguished. Many cause disease among animals and human beings, while others cause disease among plants. Nitrifying bacteria in the soil are of vital importance to higher plants. Bacteria and fungi are the causes of decay.
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References
- Standard Cyclopedia of Horticulture, L. H. Bailey, MacMillan Co., 1963
External links
- w:Bacteria. Some of the material on this page may be from Wikipedia, under the Creative Commons license.
- Bacteria QR Code (Size 50, 100, 200, 500)