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Defenition 20.1 , 20.2 , 20.3 - Coggle Diagram
Defenition 20.1 , 20.2 , 20.3
Characteristics of Fungi
Multicellular fungi
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Appear similar to plants, but do not possess chloroplasts or photosynthesize
Unicellular fungi
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Found in soils, plant surfaces, and the human body
Major Features of Fungi
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Cross walls
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Septa have large pores to allow nutrients, cytoplasm, and organelles to flow between cells.
Some fungi are aseptate, meaning they have no septa.
Chitin
is a strong flexible polysaccharide that is found in the cell walls of all fungi and in the exoskeleton of insects and crustaceans
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common colds
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Form specialized hyphae called stolons, which grow across the surface of food.
Also have rhizoids, hyphae which penetrate into food and absorb nutrients
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sac fungi
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Most sac fungi are multicellular, although it also includes unicellular groups (yeasts).
club fungi
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Can be saprophytic, parasitic, or mutualistic
Nutrition in Fungi
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All fungi are heterotrophs, but there are three main strategies for obtaining nutrients.
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Parasitic fungi
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Produce specialized hyphae called haustoria, which grow into the host tissue and absorb their nutrients.
Mutualistic fungi
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Often form a relationship with plants, trading sugars for water and nutrient uptake
Reproduction in Fungi
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Fragmentation
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If a fragment lands in a location with suitable growing conditions, the hyphae will grow into a new mycelia.
Spore production
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Producing such a large number of spores ensures that some portion of them will land in a suitable growing location.
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other fungi
Organisms in phylum Deuteromycota share only one unique trait – sexual reproduction has never been observed.
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The fungus provides structure and habitat for the photosynthetic partner, which provides food.
It’s very diverse, it has over 25,000 species
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sporangium
is sac or case in which spores are produced.the sporangia provide protection for the spores, preventing them from drying out prematurely.