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Protists and Fungi
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General Characteristics:
1. Most are unicellular but some can be multicellular. 2. All protist cells are eukaryotic. 3. They don’t fit anywhere else….they are not plants, not animals, not fungi and not bacteria.
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There are three types of protists:
1. Animal-like Divided into groups by how they move
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a. . Ciliates covered with cilia for movement example: paramecium
obtains food through its oral groove Gullet Oral groove Food vacuoles Contractile vacuole Micronucleus Macronucleus Cilia
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Removes water with contractile vacuoles
Reproduces asexually by fission or sexually by conjugation
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b. Flagellates moves by flagella, a long hairlike structure
obtains food through its cell membrane example: giardia
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c. Parasites Movement by host example: plasmodium
Causes malaria through the bite of a mosquito
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d. Pseudopods Move by pseudopods which means false foot
This method of movement is slow Example: ameba Food vacuole Nucleus Contractile vacuole Pseudopods
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2. Plantlike Protists-contain chlorophyll and carry on photosynthesis
Green protists Has no cell wall example-euglena red eyespot-sensitive to light and dark Chloroplast Eyespot Contractile vacuole Flagella Nucleus
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Fire protists example: dinoflagellate
Living things that have the ability to glow are called bioluminescent
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Golden brown protists example: diatom Some make shells out of glass
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Multicellular types (commonly called seaweeds)
Red-found in deep marine water Brown-kelp and other seaweeds Green-mostly freshwater
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3. Fungus-like protists-heterotrophs that feed on dead or decaying matter
1. slime molds 2. water molds
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Importance of protists:
1. A redtide is a bloom of dinoflagellates that produce a toxin. 2. Symbiotic relationships (like coral and algae) 3. Diseases such as malaria, dysentery, potato blight
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4. Phytoplankton-carries on about half of the photosynthesis for the world.
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4. Agar-gel like material from red algae used in laboratories to grow bacteria
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5. Algin-used to make products smooth like ice cream, cosmetics, salad dressings, syrups, pudding, candy
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6. Diatoms glass shells are used as cleansers, abrasives, filters
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Fungi Kingdom- Characteristics:
1. All fungi are multicellular except for yeast 2. All fungi are heterotrophic, they must consume their food
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Fungi are made up of tiny threads called hyphae
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Phylum Zygomycota examples: black bread mold, dung fungus
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Dung fungus
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Phylum Ascomycota forms a sac like structure for spores
This is the largest group of fungi examples: yeast, morels, truffles
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Yeast-the only unicellular fungi
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Morels
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Truffles
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Phylum Basidiomycota forms a club like structure for spores
examples: mushrooms, puffballs, rusts, smuts Rust on flax Corn smut
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Parts of the mushroom stipe hyphae
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Phylum Deuteromycota (means imperfect)
sexual reproduction never observed examples: penicillin, ring worm, athlete’s foot fungus
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Importance of fungi in the world:
1. Fungi are decomposers and recycle nutrients 2. Many cause plant diseases such as rusts and smuts. In some parts of the world the crop loss is as high as 50%
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3. Fungi cause human diseases such as ring worm, athlete’s foot, valley fever (a lung disease)
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4. Many fungi form symbiotic relationships.
a. Lichens are a fungus and a photosynthetic organism. They survive harsh places because the fungus provides water and shelter and the algae provides food.
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b. Mycorrhizae are a fungus and tree roots
b. Mycorrhizae are a fungus and tree roots. A many as 80% of plants form this relationship. The fungus provides minerals and water. The plant provides the fungus with food.
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5. Many food products are made with fungi. 6. Medicines-antibiotics
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