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Unformatted text preview: gas. Laminaria is a kelp found in the intertidal zone. It is unique among protists because it has tissue differentiation. . Phylum Oomycota: the Water Molds The phylum Oomycota includes the water molds with about 580 species. As indicated by the name, once this group was considered to belong to the fungi. Aquatic water molds parasitize fishes, forming furry growths on their gills. Some terrestrial water molds parasitize insects and plants; water mold was responsible for Irish potato famine. The body of water molds is filamentous, although cell walls are largely composed of cellulose (fungi have chitin in their cell walls). During asexual reproduction, they produce diploid motile spores (2n zoospores; most fungi lack motile spores). Unlike fungi, the adult phase of the life cycle is diploid, producing gametes by meiosis. Eggs are produced in enlarged structures known as oogonia....
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- Fall '10
- Biology, Brown algae, Kelp