Kingdom Protista What are protist Eukaryotes Mostly Unicellular

Kingdom Protista

What are 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 https: //www. youtube. com/watch? v=9 Ynm 5 ZOW 59 Q – Use cilia to sweep food particles into the gullet – Use cilia for movement (short hair likeprojections) – Example: Paramecium

Protist Phylums • Phylum Zoomastiginia – Free living – lakes or streams – Symbiotic relationship with host – One or 2 flagella to swim – Feed by absorbing nutrient – One or 2 flagella to swim – 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)