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What are protists? Very diverse group of organisms containing over 200,000 species Most are unicellular
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All protists are Eukaryotes. –What does this mean? Contains nucleus And membrane bound organelles –Any eukaryote that doesn’t fit as a plant, animal, or fungus is characterized as a Protist.
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How are protists classified? According to the way they obtain nutrition: –Autotrophs (plant-like) –Heterotrophs (animal-like) –Decomposers and parasitic heterotrophs (fungus-like)
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Animal like protists (protozoans) are distinguished from each other by the way they…
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Protozoa Means “first animals” All unicellular Classified by movement-type
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Types of movements: 1.Zooflagellates (use flagella) - Draw a picture under the box in your notes Giardia lamblia
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2. Sarcodine ( Use pseudopods -extension of cytoplasm ) - Draw a picture under the box in your notes Types of movements:
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3. Ciliates (use cilia) - Draw a picture under the box in your notes
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Animallike Protists: 4. Sporozoans- Do not move on their own –Parasitic to animals –Ex. Malaria is caused by the sporozoan Plasmodium.
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Practice! Turn to your neighbor and quiz one another on the four categories of animallike protists and how they move.
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Locomotion is generally a characteristic of animals. However, some chlorophyll- containing protists move about by means of flagella. How does this adaptation allow these photosynthetic organisms to have a higher fitness for some environments?
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Protists that contain chlorophyll and other pigments to do photosynthesis are grouped into a category called: Commonly called…
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Multicellular Algae Include seaweeds and kelp used in foods such as sushi, ice cream, salad dressing, candy, etc.
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Red Algae Characteristics: contain green and red pigments Role/Function: –Deeper sea, great at harvesting light –Help form coral reefs –Some used in foods and to make agar
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Brown algae Characteristics: contain green and brown pigments Role/Function: –Form large habitats in aquatic ecosystems –Used some in food
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Green algae Characteristics: –Green pigments Role/Function: some form symbiotic relationships with other organisms Spirogyra- multicellular Volvox- colonial Ulva- multicellular
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Lets identify some multicellular algae! Talk among your groups quickly with each picture to decide the types you see and why.
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Unicellular plantlike protists are: Euglenophytes Chrysophytes Diatoms Dinoflagellates
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Plantlike protist that have two flagella, no cell wall and contain chloroplasts
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Do you see the eyespot? What do you think is its purpose?
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Among the most abundant and beautiful organisms. Cell walls made of silica.
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Half their life is photosynthetic; the other half is heterotrophic Causes the RED TIDE
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Heterotrophs that absorb nutrients from dead or decaying organic matter they secrete digestive enzymes and then suck up the nutrients
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Fungus-like protist include: 1.Slime molds- grown on the forest floor How do these slime molds get nutrients?
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-Thrive on dead or decaying organic matter in water (ever seen dead fuzzy fish?) -Plant parasites on land 2. Water molds
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How would you classify this protist? This protist uses its flagella for movement, but is able to produce its own food. It does this because it contains green-colored chloroplasts which is uses to carry out photosynthesis.
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Ticket Out the Door What characteristics do these organisms have that place them in the Kingdom Protista?
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