protists “no more pleasant sight has met my eye than this of so many thousands of living creatures...
DESCRIPTION
Evolution of Prokaryotes to Eukaryotes How did the simple prokaryotic cell make the leap into a more complex eukaryotic cell? Theory of EndosymbiosisTRANSCRIPT
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
Where did the body come from?
Sample from Victim’s Lung Discovery Site
Lake Leaside Lake Northern Lake Lawrence
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
EndosymbiosisEndosymbiosis
Evidence of Evidence of EndosymbiosisEndosymbiosis
symbiosis of mitochondria happened early, as all eukaryotes have them
Symbiosis of chloroplasts were later
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
Animal-likeProtozoans
Plant-like Fungus-likeCharacteristicsCharacteristics
Animal-like Plant-like Fungus-like
Green algae
flagellatesRed algae
Amoeba
kelp
paramecium
Euglena
Water mould
Slime Mould
Tree slime mould
Types of ProtozoansTypes of Protozoans4 types:ZooflagellateAmoeba (Sarcodines)CiliateSporozoan
AmoebaAmoeba
Watch Amoeba Video:http://www.youtube.com/watch?v=W6rnhiMxtKU&feature=related
2. Plant like Protists2. Plant like ProtistsTypes:EuglenoidsAlgae
Question: Why can euglenoids not be classified in Kingdom Plantae?
RED ALGAE
•Multicellular seaweeds found in mainly warmer seawater
•Seaweed important industry
SLIME AND WATER SLIME AND WATER MOULDSMOULDS
ReproductionReproductionAnimal-like and plant-like protists can
reproduce sexually and asexually.
Asexual Reproduction
Sexual Reproduction
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
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
Cosmetics Carrageenan – acts like thickening agents
in shampoo◦Abrasives substances
Found in polishes and toothpaste◦Fertilizer
Used on gardens