week 6 notes

week 6 notes - Week 6 notes: Fungus Do not photosynthesize...

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Week 6 notes: Fungus Do not photosynthesize Do not have chloroplasts Structure: o Mycelium: the feeing network of a fungus Largest living organism is actually a fungus Consist of thousands of hyphae o May be very large o Usually underground or inside a decaying or living organism o Composed of a woven mesh of hyphae (single hypha) Thread like filaments of the fungus All over the place—live with humans in a symbiotic relationship o Tubular cell wall containing chitin (cells walls) A structural polysaccharide of modified sugars (have side groups on them) Makes up insect exoskeleton and fungus cell walls Polymer with glucose subunits and N-containing functional groups Have cell walls, multicellular, eukaryotic o Surrounds the plasma membrane and cytoplasm Humans have a plasma membrane that surrounds our cells with no cell walls Bacteria has a cell and a wall Septa: o Structures which partially separate the cytoplasm inside the hyphae, found in many fungi Spores: o Haploid cell which can grow directly o Only has one copy of each chromosome o Most life cycle is a haploid which can grow directly into a hypha Every single cell that makes up the bodies fungus only has one copy of the life chromosome is a fungus How do fungi live? o Use absorption to obtain their food o Three variations depending on the food type o Saprobes: Decomposers of dead material (most fungi) When trees fall out or an animal dies, it rots and breaks down and is recycled into the environment o Parasites: Fungi which grow on living organisms (Athletes foot, Yeast Infections, Jock Itch) o Mutualists: Fungi that live interdependently with photosynthetic organisms Lichens:
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Symbiotic relationship between a fungal species and either a cyanobacteria (prokaryote) or unicellular photosynthetic eukaryote
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week 6 notes - Week 6 notes: Fungus Do not photosynthesize...

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