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Chapter 22 Protist
• Protist Diversity
• Protozoan: Animal-like Protists
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22.2 Algae: Plant-like Protists
What are Algae?
Phyla of Algae
Reproductive strategies of Algae Funguslike 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
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cilia
flagella
pseudopodia
non-motile
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Animal - like Amoebas
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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
Paramecium morphology
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Paramecium feeding
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Flagellated Protist
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 Vacuoles
Vacuole 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
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
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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
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Unicellular in size
Cell wall is made of thick plates
Move by using two flagella
One species causes Red tide
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
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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