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Unit 3
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Protists are eukaryotes that are not member of the Plant, Animal or Fungi kingdoms. Most (but not all) are unicellular
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One way protists can be classified is by how they obtain nutrition: o Heterotrophs- called animal-like protists o Photosynthesizers- called plant-like protists o Decomposers and parasites- called fungus-like protists. Animal-like: Amoeba Plant-like: Euglena Fungus-like: Slime Molds
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There are four phyla of animal-like protists o Zooglagellates o Sarcodines o Ciliates o Sporozoans Animal-like protists are classified by their means of movement.
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Animal-like protists that swim using flagella are called zooflagellates. Flagella are long, whiplike projections that allow a cell to move.
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Sarcodines are animal-like protists that have pseudopods. Pseudopods (false foot) are temporary cytoplasmic projections used for feeding or movement.
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Flexible, active cells with thick pseudopods that extend out of the central mass of the cell.
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Cilates use cilia for feeding and movement. Cilia are short hair like projections that propel a cell. The paramecium is an example of a ciliate. o The cilia are grouped into rows and bundles and beat in a regular pattern.
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Sporozoans do not move on their own- they are parasitic Some animal-like protists cause serious diseases, such as malia
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Label the following parts on the below paramecium. o Cilia o Oral Groove o Micronucleus o Macronucleus o Trichocysts
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Domain: Eukarya, Kingdom: Protista, Phylum: Sarcodina contain pseudopods= false feet Pseudopods used for both movement and feeding o Feeding: Phagocytosis- pseudopods extend out and wrap around food particles, making a food vacuole. The food will eventually be digested by the lysosomes. The contractile vacuole is used to pump out excess water out of the cell.
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Domain:Eukarya, Kingdom: Protista, Phylum: Cilaphora Move by tiny hair-like projections called cilia. The pellicle is a thick outer membrane, reason Paramecium cannot change their shape. Two types of nuclei: Macronucleus and Micronucleus Feeding: Heterotrophs, food enters through the oral groove, and become a food vacuole. Undigested food particles are eliminated through the anal pore. Trichocysts are threadlike structures used as a defense mechanism
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Plant-like protists contain chlorophyll and carry out photosynthesis. Plant-like protists are commonly called “algae” Algae are sometimes classified with the plants.
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Domain: Eukarya, Kingdom: Protists, Phylum: Euglenophyta Move through the use of a flagella Feeding: can be both an autotroph and a heterotroph o Autotroph: sunlight and the use of chloroplasts, Eyespot can detect light. o Heterotroph: absorbing nutrients across the cell membrane Firm cell membrane called a pellicle Contractile Vacuole that removes excess water from the cell
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Pg 498: #1,3,4,5 Pg 505: #1,2 Pg 523: #1,2,4, 11, 13 Assignment is due on Thursday Oct 30 th.
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