1. The Protists

2. Kingdom Protista Eukaryotic
Most are single celled, but may be in colonies. A few are considered multicellular, but do not show specialization.
Live in moist habitats
Protists are extremely diverse. They may be plant-like, animal-like, fungus-like or anywhere in between.
Mini Question

3. Questions
1. How is a eukaryotic cell different from a prokaryotic cell?
2. Why are protists considered eukaryotic?
3. Euglena are protists that have flagella and chloroplasts. They are both heterotrophic and autotrophic. Why would this present a problem to a taxonomist using a classification system with only plant and animal kingdoms?

4. Protista: Reproduction
Sexual and/or Asexual reproduction depending on the species
Some have complex life cycles involving other organisms
Ex. Plasmodium (which causes malaria)

5. Plant-like Protists Green Algae – single celled
Brown algae – kelp/seaweed
Red algae – single celled, causes red tides. Can cause major fish-kills.
Diatoms – secrete a silica shell. The shells collect over time.
Diatomacheous earth is used in toothpaste!

12. Plant/Animal Like Protists
Euglena
Moves with a whip-like flagellum
Has chloroplasts – can do photosynthesis
May also hunt if necessary
Has a red eye spot that can sense light
Contractile vacuole controls water pressure

14. Phylum Sarcodina – Amoeba
Animal Like Protists
Phylum Sarcodina – Amoeba
Moves with Amoeboid motion using a psuedopod (false foot)
Fierce Hunter – eats through endocytosis
Has a contractile vacuole

16. Animal Like Protists Phylum Ciliophora – paramecium
Move with cilia – small hairs along the body.
Very fast hunters
Have an oral grove and anal pore
Also have a contractile vacuole

17. Giardia – lives in freshwater all over the world.
Parasitic Protists
Giardia – lives in freshwater all over the world.
Causes diarrhea, food sensitivity, nausea, exhaustion.
Very common in animals

18. Parasitic Protists Plasmodium Causes malaria
Lives in the red blood cells and liver
Breaks apart blood cells as it reproduces
Transmitted to new hosts by a mosquito vector (in between organism)
Causes fevers, headaches and death