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Ch 31 PowerPoint
Ch 31 PowerPoint
Ch 31 PowerPoint
Ch 31 PowerPoint
Ch 31 PowerPoint
Ch 31 PowerPoint
Ch 31 PowerPoint
Ch 31 PowerPoint
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Ch 31 PowerPoint

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The wonderful world of fungi.

The wonderful world of fungi.

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  • 1. Ch 31: Fungi By: Monica Puccetti
  • 2. 31.1 Fungi are heterotrophs
    • They can’t make their own food.
    • They gain nutrients by secreting powerful hydrolytic enzymes into their surroundings
    • The enzymes break down complex molecules into smaller ones that the fungi can absorb into their bodies.
    • They play an important role in ecosystems as decomposers.
  • 3. Body Structure
    • Most common are multicellular filaments and single cells (yeasts).
    • Hyphae is a continuous network of tiny filaments in the mushroom and the surrounding area.
    • Fungal hyphae form an interwoven mass called a mycelium. This infiltrates the fungi’s food.
    • Chitin strengthens fungal cell walls, like cellulose in plant cells.
  • 4.  
  • 5. 31.5 Fungi as decomposers, mutualists, and pathogens
    • Without fungi life as we know it would not exist.
    • Without them necessary elements such as carbon, nitrogen, and others would remain stuck in organic material.
  • 6. Fungi as Mutualists
    • Endophytes: Fungi that live inside leaves or other plants parts without causing them harm.
    • Fungi also help in the digestive process of animals, helping to break down plant material.
  • 7. Fungi as Pathogens
    • 30% of the 100,000 known species of fungi are parasites or pathogens, mostly of plants.
    • Only 50 species of fungi infect animals.
      • A fungal infection in animals is called mycosis
      • Many opportunistic mycoses have become more common in humans, due to the recent insurgence of AIDS which compromises the immune system.
  • 8. Practical Uses of Fungi
    • Humans uses fungi to make cheese, bread, and alcoholic beverages.
    • Antibiotics, such as Penicillin, are produced by growing them in fungus.
    • Genetic research on fungi is leading to advances in biotechnology.

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