1. KINGDOM PROTISTA

2. First appeared 1.5 billion years ago
Eukaryotic
Found in fresh or salt water
Unicellular
Lack specialized features
No embryos or complex sex organs
Most aerobic

3. CLASSIFIED INTO THREE DIFFERENT GROUPS:
Animal-like Protists
(Protozoan – means First Animal)
heterotrophs
 ingest food from surrounding
Vary in size (2 цm  5 cm) and form
Can be parasitic
Aquatic

4. Four Phyla based on method of Locomotion
A) Sarcodines
amoeboid movement by pseudopods (False Feet)
 cytoplasmic extension and retraction of pseudopods to engulf food particles

5. Amoeba movement

6. B) Flagellates whip like flagella
most are parasitic and cause disease in animals
some have chloroplasts
ex. Euglena, trypanosomes, giardia

7. C) Ciliates hair like for synchronized swimming
reproduce asexually by binary fission
sexually by conjugation
ex. Paramecium, stentor, vorticella
Movement video cilia and flagellum

8. D) Sporozoans non- motile, depend on body fluids of host for movement
all parasitic
complex life cycles
ex. Plasmodium viviax (malaria)
see pg. 355 fig. 10

10. Plant – like Protists
autotrophic  contain chlorophyll and are photosynthetic pigments
Unicellular or multicellular
Aquatic
6 phyla based on type of chloroplasts and pigments
E.g. euglena, algae

12. Fungus–like Protists Referred to as slime moulds
Most are saprotrophic (live dead organic matter)
Aquatic or terrestrial
Some are parasites
E.g. plasmodium

14. IMPORTANCE OF PROTISTS
Found almost everywhere in the biosphere
Provide a food source for other organisms (even other protests)
Algae perform 50% to 75% of all photosynthesis on Earth and so produce most of the world’s free oxygen
Algae also provides agar, which is used in drug capsules, gels and cosmetics
Diatoms contain silica, which is used in insulation and filtration materials
Algae are instrumental in the creating of petroleum resources