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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