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Unit 6 Part 3

Fungi. Unit 6 Part 3. Characteristics. Eukaryotic heterotrophs Multicellular (except yeasts) Cell wall Made of chitin. Characteristics. Digest food outside of their bodies and then absorb it Some absorb decaying matter in the soil ( saprotrophic  decomposers )

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Unit 6 Part 3

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  1. Fungi Unit 6 Part 3

  2. Characteristics • Eukaryotic heterotrophs • Multicellular (except yeasts) • Cell wall • Made of chitin

  3. Characteristics • Digest food outside of their bodies and then absorb it • Some absorb decaying matter in the soil (saprotrophic  decomposers) • Some are symbiotic (lichen, plants) • Some are parasitic – absorb nutrients from host

  4. Characteristics • Fungi as parasites: • Plant diseases (mildew, corn smut) • Human diseases (foot fungus, yeast infections) • Other animal diseases (Cordycepsfungus)

  5. Fungal Disease

  6. Fungal Disease

  7. Fungal Disease

  8. Structure & Function • Composed of thin filamentscalled Hyphae • Hyphae are tangled together in a thick mass called mycelium • Large surface area for absorbing nutrients

  9. Structure & Function • Fruiting body – reproductive structure; grows from the mycelium in the soil • Can have many f.b.’s emerging from same mycelium

  10. Structure & Function • Mycelium can live for many years • Over time…nutrients are depleted from soil around them…Why? • Result…

  11. Structure & Function • Fairy Rings • New fungi sprout at edges of mycelium, forming rings.

  12. Reproduction • Asexual: • Cells/hyphae break off + grown on own • Scattered spores (reproductive cell; grows into new org. through mitosis alone)

  13. Reproduction • Sexual: • No “male/female” • Called “+” and “-” • Hyphae from + and – fuse together and produce a diploid zygote

  14. Classification • Common Mold • Black bread mold • Sac Fungi • Largest group of fungi • Includes yeasts

  15. Classification • Club Fungi • Reproductive structures look like clubs • Extremely diverse

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