Kingdom: Protista

A MIXED UP KINGDOM This kingdom is the most diverse group of organisms. They move like animals Photosynthesize like plants Produce spores like fungus

What is a Protist? Protists live in almost any environment that contains water. Many protists, such as the algae, are photosynthetic and are vital primary producers in ecosystems, particularly in the ocean----plankton.

What is a Protist? Eukaryotic Unicellular or multicellular Heterotroph or autotroph Some have cell walls

Chapter 19, page 502 Pretzel slime mold (pg 502)

Move with one or more flagella

Pa Paramecium Euglena

Movement & Support Pseudopods Cilia Flagella Some have cell walls Shells of silica and calcium carbonate Some algae have holdfasts (root) and air bladders (buoyancy) Pellicle a thin layer supporting the cell membrane

Digestion/Obtaining Nutrients Heterotroph Endocytosis Diffusion Decomposers Oral groove, cilia, gullet, food vacuoles (pg 507) Autotrophs with pigments and chloroplasts

Nervous/Response Nucleus (macro and micro) Formation of cysts Eye spot for light detection Bioluminescent Produce toxins

EUGLENA

Circulation Flow of cytoplasm

Gas Exchange Diffusion

Excretion Diffusion Contractile vacuole Anal pore

Reproduction Sexual – gametes Asexual – binary fission Conjugation Spores Fragmentation Alternation of generations

Helpful Protists Algae (photosynthesis) Diatoms (a group of algae called phytoplankton.)

Harmful Protists Entamoeba histolytica http://www.cdc.gov/parasites/amebiasis/ Giardia lamblia http://www.cdc.gov/parasites/giardia/

Trichonympha-termites Trypanosomes-( many species, one causes sleeping sickness carried by tsetse fly) http://www.cdc.gov/parasites/sleepingsickness/biology.html trypanosome infecting RBC’s

Phytophtora infestans Gonyaulaux catanella (A marine dinoflagellate protozoan that produces a powerful toxin that accumulates in the tissues of mussels and shellfish; it may cause fatal poisoning in humans who have eaten contaminated shellfish.) Phytophtora infestans (caused European potato famine of 1840’s)

Malaria Plasmodium http://www.cdc.gov/Malaria/ Infected RBC’s