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Fungi 1 Thallus

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In almost all fungi the hyphae that make up the thallus have cell walls. (The thalli of the true
slime molds lack cell walls and, for this and other reasons, are classified as protists rather than
fungi.) A hypha is a multibranched tubular cell filled with cytoplasm. The tube itself may be
either continuous throughout or divided into compartments, or cells, by cross walls called septa
(singular septum). In nonseptate (i.e., coenocytic) hyphae the nuclei are scattered throughout the
cytoplasm. In septate hyphae each cell may contain one to many nuclei, depending on the type of
fungus or the stage of hyphal development. The cells of fungi are similar in structure to those of
many other organisms. The minute nucleus, readily seen only in young portions of the hypha, is
surrounded by a double membrane and typically contains one nucleolus. In addition to the
nucleus, various organellessuch as the endoplasmic reticulum, Golgi apparatus, ribosomes,
and liposomesare scattered throughout the cytoplasm.

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1 Surname Student’s Name Course Date In almost all fungi the hyphae that make up the thallus have cell walls. (The thalli of the true slime molds lack cell walls and, for this and other reasons, are classified as protists rather than fungi.) A hypha is a multibranched tubular cell filled with cy ...
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