Bio Exam II. 2 Fungi

  1. Fungi are all __. None are __.

    Majority are __.

    A small amount are __.

    photosynthetic (same for water molds)

    saprophytes (feed on dead organisms)

  2. What is similar about fungi and water molds?
    they are both saprophytes and parasites; none are photosynthetic
  3. Organism complexity?
    • a) unicellular (small minority)
    • b) filamentous (vast majority)
    • ----single filament= hypha (pl. hyphae)
    • ----mass filaments= mycelium
  4. Difference in hypha between fungi and WM?
    • fungi: in alot of them, you can see individual cells
    • in the water mold: they appear coenocytic
  5. The fungus secretes __ that will do what?
    • enzymes
    • break down the larger molecules in the substrate--> absorb molecules

    - because the fungus (whether uni or fil) has a cell wall, large molecules will be unable to go through the hyphae; fungi can't do phagocytosis; absorption is the only possible way
  6. Feed through __
    - what do they feed on? 

    A few have __:
    - what are the two?
    • absorption
    • depends on the fungus

    • specialized hyphae (not all have specialized hyphae)
    • - rhizoids: found in a few saprophytes
    • - haustoria: found in parasites
  7. Reproductive structures may be __ or __, depending on teh group. 
    - Even if it is __, it still made of __ (densely packed).
    macro or microscopic

    • macroscopic
    • hyphae
  8. Human relevances (7)
    a) decomposers in ecosystem (all fungi [saprophytes])

    b) decompose our food, materials (anything organic)

    c) cause many plant diseases, many economically important= major area of research

    d) Cause a small number of animal diseases

    e) Used industrially in the manufacture of many organic compounds

    f) used in the food industry to make products or are eaten directly

    g) used in research, e.g. biochemical genetics, resistant varieties of crop plants
  9. Five naturally occurring phyla?

    one artificial phylum?
    • chytridiomycota
    • zygomycota
    • ascomycota
    • basidiomycota
    • glomeromycota

  10. Ecosystems cant function without __. They are major contributors in the __.

    How do fungi differ from bacteria?
    • decomposers
    • decomposition of cellulose

    • bacteria: pro
    • fungi: euk
  11. What do we mean by artificial fungi?
    • not officially related
    • they are put there because they are similar
  12. How do fungi differ from slime molds?
    no plasmodial stage/ can't phagocytize

    • in the vegetive state:
    • - of plasmodium: no cell walls
    • - cellular slime molds: amoeba-like cells
    • - of fungi: do have cell walls
  13. Difference between fungi and water molds?
    • Fungi: have a cell wall made of chitin
    • Water molds: have a cell wall made of cellulose
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Bio Exam II. 2 Fungi