Kingdom Protista

What are protist? What are the classifications of Protist? Eukaryotes, Mostly Unicellular Organism Evolved from the symbiosis of several cells of Archaebacteria Endosymbiotic Theory Lynn Margulis What are the classifications of Protist? Heterotrophs Animal – like Protozoa (classified by locomotion) Fungus – like Protist (absorb nutrients from dead/decaying organisms) Autotrophs Plant – like Protist (unicellular and plant like protist)

Animal Like Protist

Protist Phylums Phylum Sarcodina Free living- Fresh or brackish water, bottom dwellers Parasitic Pseudopod: temporary cytoplasmic projection Food vacuoles, some have shells Use pseudopods to take in food by phagocytosis Use psedopods for movement and feeding (phagocytosis) Example: Amoebas, Foraminiferan, Heliozoan

Parts of the amoeba

Protist Phylums Phylum Ciliophora (Ciliates) Free living- Fresh and salt water Have two nuclei: Micronucleus and Macronucleus Contractile vacuoles, gullet, cilia Use cilia to sweep food particles into the gullet Use cilia for movement (short hair like-projections) Example: Paramecium https://www.youtube.com/watch?v=9Ynm5ZOW59Q

Protist Phylums Phylum Zoomastiginia Free living – lakes or streams Symbiotic relationship with host One or 2 flagella to swim Feed by absorbing nutrient Example: Trypanosoma Causes sleeping sickness spread by tsetse fly Giardia

Protist Phylums Phylum Sporozoa Habitat – host organism Sporozoites Live off the host. Infects and destroys RBC No locomotion All parasites with complex life cycles Example: Plasmodium (causes malaria)