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Kingdom Protista
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Protists
• Contain a very diverse group of organisms that are had to classify!
• ALL EUKARYOTIC
• Can be unicellular OR multicellular
• Unicellular – ONE cell
• Multicelluar – MANY cells
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1. Animal-like Protists
• Known as PROTOZOANS
• Many are parasites, living in water, in soil and on other organisms
• They have special structures for movement!
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Structures of Movement
• Flagellum: Long projection that looks like a tail
• Pseudopods: Projections of cytoplasm to capture food and move
• Cilia: Short hair-like projections for movement and feeding
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Watch and See
• Go to www.missconnelly.weebly.com
• Click on Biology
• Click on Unit 11 – Living Organisms
• In the Protist Section – play each video to see how each structure causes movement
• At the very bottom, listen to the raps…can you do better? - EARLY FINISH – you and a partner(s) create your own rap!
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Did you observe closely?
• Which organism has which structure?
• Structure: Flagella Organism: ___________
• Structure: Pseudopods Organism: ___________
• Structure: Cilia Organism: ___________
• Structure: Eyespots Organism: ___________
• Make sure you put this in your notes!
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2. Plant – like Protists
• Known as Algae
• Contains chloroplast and can perform photosynthesis
• Also have cell wall, flagella, and eyespots
• Many different types! Including diatoms (produce silicon), dinoflagellates (two flagella), euglenas (unicellular), red algae, brown algae (seaweed), green algae (very similar to plants).
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Make sure you know the examples…
Diatoms Dinoflagellates Euglena
Red Algae Brown Algae - Seaweed Green Algae
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3. Fungi-like Protist
• Heterotrophs that get their food from decomposing organisms
• Have cell walls
• Examples: Slime molds, water molds, some mildews
Make sure you know the examples
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Take a look
Slime mold
Water Mold
Mildew
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Do you remember STERN GRR? (mini review)
• Watch the video by clicking the link below
• The BIOLOGY SONG
• I know ya’ll have been waiting on this…
• All LIVING things do STERN GRR!!
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Protist Life Processes STERN GRR
• Synthesis
• Some can do photosynthesis (make it’s own food (glucose) from the sun)
• ALL do PROTEIN SYNTHESIS and build organic molecules
• Transport
• Use DIFFSUION and OSMOSIS to regulate levels of water, gases, and molecules
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• Excretion
• Gets ride of wastes through an anal pore
• Respiration
• Takes in CO2 and O2 through diffusion
• Growth
• Grow using mitosis – identical cells
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• Nutrition
• Can be autotrophic or heterotrophic
• Can consume food through oral groove
• Reproduction
• Can reproduce sexually and asexually
• Regulation
• Controls what goes in and out of the cells using a contractile vacuole (expands by sucking things in or contracts by squeezing things out)
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Adaptive Behaviors of Protist
• Eyespots – responsible for phototaxis
• Phototaxis – movement of an organisms towards or away from light.
• If there is a lack of light or too much light, the organism with eyespots must ADAPT in order to survive
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• Protists also respond to food
• Chemotaxis – organisms moves towards or away from food/substances needed for survival.
• Example: dinoflagellates