protists “no more pleasant sight has met my eye than this of so many thousands of living creatures...
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Evolution of Prokaryotes to Eukaryotes How did the simple prokaryotic cell make the leap into a more complex eukaryotic cell? Theory of EndosymbiosisTRANSCRIPT
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PROTISTS
“No more pleasant sight has met my eye than this of so many thousands of living creatures in one small drop of water.”Anton van Leeuwenhoek
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Where did the body come from?
Sample from Victim’s Lung Discovery Site
Lake Leaside Lake Northern Lake Lawrence
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Evolution of Prokaryotes to Evolution of Prokaryotes to EukaryotesEukaryotes
How did the simple prokaryotic cell make the leap into a more complex eukaryotic cell?
• Theory of Endosymbiosis
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EndosymbiosisEndosymbiosis
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Evidence of Evidence of EndosymbiosisEndosymbiosis
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symbiosis of mitochondria happened early, as all eukaryotes have them
Symbiosis of chloroplasts were later
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Kingdom ProtistaKingdom ProtistaCharacteristics:EukaryotesMicroscopicLive in environments with waterConsidered “grab bag” of
species:◦Consist of eukaryotic organisms that
do not fit into Kingdom Fungi, Animalia or Plantae
Protists are not animals, plants or fungi
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Animal-likeProtozoans
Plant-like Fungus-likeCharacteristicsCharacteristics
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Animal-like Plant-like Fungus-like
Green algae
flagellatesRed algae
Amoeba
kelp
paramecium
Euglena
Water mould
Slime Mould
Tree slime mould
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Types of ProtozoansTypes of Protozoans4 types:ZooflagellateAmoeba (Sarcodines)CiliateSporozoan
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AmoebaAmoeba
Watch Amoeba Video:http://www.youtube.com/watch?v=W6rnhiMxtKU&feature=related
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2. Plant like Protists2. Plant like ProtistsTypes:EuglenoidsAlgae
Question: Why can euglenoids not be classified in Kingdom Plantae?
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RED ALGAE
•Multicellular seaweeds found in mainly warmer seawater
•Seaweed important industry
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SLIME AND WATER SLIME AND WATER MOULDSMOULDS
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ReproductionReproductionAnimal-like and plant-like protists can
reproduce sexually and asexually.
Asexual Reproduction
Sexual Reproduction
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Protists in our Everyday Protists in our Everyday LivesLivesParasitic protists can cause diseases when it they come into contact with the human body◦Example: malaria,
sleeping sicknessdysentery
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Protists in our Everyday Protists in our Everyday LivesLives
Algae ◦Food indusry
Seaweed can be eaten. Example: sushi Beta-carotene from green algae is yellow-
orange food colouring◦Medicine
Used for curing arthritis, influenza, tuberculosis
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Cosmetics Carrageenan – acts like thickening agents
in shampoo◦Abrasives substances
Found in polishes and toothpaste◦Fertilizer
Used on gardens