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Chapter 22 Protist• Protist Diversity• Protozoan: Animal-like Protists
• 22.2 Algae: Plant-like Protists• What are Algae?• Phyla of Algae• Reproductive strategies of Algae
Fungus-like Protists
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Chapter 22 Protist continued• 22.3 Different Kinds of Fungus like
Protists• Slime Molds• Water Molds and Downy Mildews
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Protist Diversity• Most Diverse of all five kingdoms• size varies from microns to over 100
meters• 200,000 species • All are Eukaryotes
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Protozoan: Animal-like Protists• Unicellular heterotrophs• classified by their method of
movement– cilia– flagella– pseudopodia– non-motile
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Animal - like Amoebas
• Phylum sarcodina• No wall outside cell membrane• move by forming pseudopodia• live in water or wet patches • have problem with Osmosis• Contractile vacuoles are Use to
eliminate waste
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Amoebas pictures
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Amoebas with Shells• Hard Shell
Amoeba
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Amoeba feeding
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Ciliated Protist
Paramecium
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Paramecium morphology
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Paramecium feeding
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Flagellated Protist
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Flagellates: Protozoans that move with Flagella
• Animal-like because they move and aren’t able to make their own food
• Some have a single flagella and others have two
• Are aquatic / marine single cell organisms
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Non-Motile Protist• Giardia- cause of Malaria
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Reproductive strategies of Sarcodines
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Contractile VacuolesVacuole filled with waste products
Emptied vacuole waste material
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22.2 Algae: Plant-like Protists• Plant like protist that utilize
Photosynthesis• Some are unicellular• some are multicellular• All are Aquatic / Marine
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What are Algae?• Six different groups
– Unicellular
•Euglenoid•Diatoms•Dinoflagellates
– Multicellular
•red algae •Brown algae • Green algae
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Euglenoid
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Euglenoid Protist
• They are unicellular• Are heterotrophs• Utilize Photosynthesis to make their
food• Can absorb food during dark periods• Have and eyespot to help find light• single flagella to swim
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Euglena- picture 2
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Euglena diagram
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Diatoms- protist
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Diatom - assorted picture
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Diatom facts
• Have two halves to their hard shells which are made of silica
• undergo both asexual and sexual reproductions
• Vital part of the food chain in oceans
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Diatom - reproduction
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Dinoflagellates pictures
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Dinoflagellate info
• Unicellular in size• Cell wall is made of thick plates• Move by using two flagella• One species causes Red tide
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Red algae Picture
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Red Algae information
• Another name for this group is red seaweed
• acts like and looks plants - attaches itself to the bottom and has a long stem like structure with what looks like leaves.
• Deep ocean location because they can absorb blue colors ( most penetrating light)
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Brown Algae - pictue
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Brown Algae picture 2
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Brown Algae information
• Another name for this group is Brown seaweed ( kelp)
• loves cold water• uses a thallus to attach itself to
rocks• no real stem or roots• Agar ( gelleton ) comes from this
protist
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Green Algae - picture
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Green Algae picture 2
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Green Algae information
• Most are fresh water organism• some are unicellular/ multicellular• Reproduce by using both sexual
and asexual reproduction• Use Alternating generation
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Reproductive strategies of Algae
Gammetophyte plant( n) Female
Gammetophyte plant ( n) Male
Gametes Gametes
Zygote
Sporophyte plant
Spores
Meiosis
Gammetophyte plant ( n) Male
Gammetophyte plant( n) Female
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Alternating Generation -diagram
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22.3 Fungus-like Protists
• Colorfull - ranging in color ( red, blue, violet to yellow
• live in cool moist environments• live off rotting organic matter• are motile
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Different Kinds of Funguslike Protists• There are three phyla of fungus
like molds– slime molds
•plasmodial•cellular
– water molds
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Slime Molds- plasmodial
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Slime mold - cellular
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Water Molds and Downy Mildews
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