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 NorthernLake Lawrence

Evolution of Prokaryotes to Eukaryotes How did the simple prokaryotic cell make the leap into a more complex eukaryotic cell? Theory of Endosymbiosis

Endosymbiosis

Evidence of Endosymbiosis

symbiosis of mitochondria happened early, as all eukaryotes have them Symbiosis of chloroplasts were later

Kingdom Protista Characteristics: Eukaryotes Microscopic Live in environments with water Considered “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-like Protozoans Plant-likeFungus-like Characteristics

Animal-likePlant-likeFungus-like Green algae flagellates Red algae Amoeba kelp paramecium Euglena Water mould Slime Mould Tree slime mould

Types of Protozoans 4 types: Zooflagellate Amoeba (Sarcodines) Ciliate Sporozoan

Amoeba Amoeba Watch Amoeba Video: W6rnhiMxtKU&feature=related

2. Plant like Protists Types: Euglenoids Algae 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 MOULDS SLIME AND WATER MOULDS

Reproduction Animal-like and plant-like protists can reproduce sexually and asexually. Asexual Reproduction Sexual Reproduction

Protists in our Everyday Lives Parasitic protists can cause diseases when it they come into contact with the human body ◦ Example: malaria, sleeping sickness dysentery

Protists in our Everyday Lives 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