In General Usually unicellular Reproduction: Some asexual, some sexual, some both Kingdom for life that doesn’t fit in animals, plant or fungi kingdom Mostly aquatic life 3 main categories

Animal-Like Protista AKA: Protozoans Aquatic, unicellular Heterotrophic: pathogens, parasites, predators Pseudopods : have pseudopodia (false- feet) – Engulf by phagocytosis – Amoebas, Foraminifera Flagellates: have flagella – Zooflagellates Ciliates: have cilia – Paramecia

Amoeba Video Clips

Amoeba feeding

Animal-Like Protistans

Animal-Like Protista & Disease Phylum Apicomplexa Malaria: Infected mosquito bites – Fever, vomiting, coma, death Sleeping sickness: bite of tsetse flies – Coma & death

Plantlike Protista AKA: Algae Most unicellular; No leaves, stems, roots Perform photosynthesis with chloroplasts – Seaweed, kelp Euglenoids: use flagella to swim – Animal & plant-like Dinoflagellates – Most phytoplankton (Basis of aquatic food chains) Diatoms – Glasslike shells – Provide ~ ½ the O 2 on earth

Plant-Like Protistans

Origins of Multicellularity Live in 3 arrangements 1) Single-celled 2) Multicellular colonies; independent acting cells – Over time, cells became somewhat specialized 3) Multicellular colonies; specialized cells – Over time, cells dependent on others because of specialization Beginning of multicellular life???

Fungus-like Protista Decomposers: recycle nutrients Moist environments Mobile at stages of life cycle – Spores can develop cilia Slime Molds: large (~1 meter) single celled mass of cytoplasm – Fungus & animal-like Water molds: can be parasitic – Potato blight: disease