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Unformatted text preview: Algae Some marine algae—the kelps—look like plants with stem-like stalks supporting “leaf” blades and a holdfast that anchors the kelp to rocks on the sea bottom. Growing offshore in colder northern waters they sometimes attain a height of 50–60 meters—the largest protists. Most of the algae are constructed more simply and are smaller—many are unicellular and microscopic in size. The algae, like the rest of the protists, have evolved a wondrous array of body forms and lifestyles—unicellular, motile free-living; complex aggregations of cells in colonies; filaments, nets, coenocytic tubes; microscopic, slimy green threads—all are common algal forms. The variable body structure is not useful taxonomically to separate the major groups, nor are the reproductive structures particularly helpful. Instead, the following five features are more definitive and reproductive structures particularly helpful....
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This note was uploaded on 11/14/2011 for the course BIO 1421 taught by Professor Farr during the Fall '08 term at Texas State.
- Fall '08