Structure - Structure The fungi are eukaryotic and have...

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Unformatted text preview: Structure The fungi are eukaryotic and have membrane-bound cellular organelles and nuclei. They have no plastids of any kind (and no chlorophyll). The hyphae of the fungi are of two general kinds: Some are septate , and are divided by septa (walls) that separate the cylindrical hypha into cells; in the nonseptate fungi, the hypha is one long tube. (The septa are perforated, however, permitting the cytoplasm to flow throughout the length of the filament.) Mitosis occurs in the nonseptate hyphae, but there is no accompanying cytokinesis (division of the cytoplasm) so the hyphae are multinucleate (with many nuclei). The special name for this condition—an organism or part of an organism with many nuclei not separated by walls or membranes—is coenocytic , and the organism is a coenocyte. A few fungi—called by the general name yeasts—are single-celled, and nonfilamentous much of the...
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