Chapter 22 Protist

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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 arent 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

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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
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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