Diversity of Life Protista

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Diversity of Life- Protista -
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What are Protista?
A very diverse group of unicellular (usually but
not always) eukaryotes. Most primitive creatures
to have organelles and nuclei bound by
membranes BUT Protista as a group doesnt
exist anymore - just used as a convenience.
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Original members of the Protista
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Why are Protista so diverse?
ENDOSYMBIOSIS
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Why are Protista so diverse?

• Whats the evidence?
• DNA in organelles of red and green algae is very
  similar to cyanobacterial DNA
• Number of membranes that surround the organelles

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Groups that well be dealing with
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Protist groups - Euglenozoa
Key Characteristic -spiral or crystalline rod
inside the flagellum
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Euglenozoa - Euglena
eyespot
Contractile vacuole
nucleus
Paramylon granule
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Protist groups - Alveolata
Key characteristic - Alveoli - sacs under the
plasma membrane
alveoli
plasma membrane
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Protist groups - Alveolata
Some important members of the group -
Dinoflagellates - some poisonous species
Red tide
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Protist groups - Alveolata
Some important members of the group -
Dinoflagellates - some useful species -
symbiotic with corals and other marine animals
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Protist groups - Alveolata
Some important members of the group - Ciliates
- use cilia (not flagella) for locomotion -
possess both micro- and macronuclei
contractile vacuole
oral groove
macronucleus
food vacuole
Paramecium
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Protist groups - Alveolata
Paramecium reproduction
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Protist groups - Stramenopila - possess two
types of flagella - hairy and smooth
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Protist groups - Stramenopila
Brown algae - seaweeds (kelp)
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Protist groups - Stramenopila
Brown algae - seaweeds (kelp)
Thallus
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Protist groups - Stramenopila
Brown algae - alternation of generations
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Protist groups - Amoebozoa
Key characteristic - lobe-shaped pseudopodia
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Protist groups - Amoebozoa
Gymnamoeba
- feeding
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Protist groups - Amoebozoa - cellular slime molds