The Eukaryotes 12a: Protozoans. Eukaryotes in general cells chromosomes made of chromatin cell division: mitosis & cytokinesis (if) sexual reproduction.

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Presentation transcript:

The Eukaryotes 12a: Protozoans

Eukaryotes in general cells chromosomes made of chromatin cell division: mitosis & cytokinesis (if) sexual reproduction meiosis fertilization

Kingdom Protista highly diverse; may be more than 1 mostly unicellular 2 “lifestyles” photoautotrophic: algae chemohetero & often mobile: protozoa

Protozoa nutrition trophozoite vs. cyst “free-living” vs. parasite Protozoa locomotion cilia/flagella/amoeboid flow by vector Protozoa life cycle & reproduction asexual: fission, budding, coenocyte, schizogony

budding coenocyte schizogony

Protozoa nutrition trophozoite vs. cyst “free-living” vs. parasite Protozoa locomotion cilia/flagella/amoeboid flow by vector Protozoa life cycle & reproduction asexual: fission, budding, coenocyte, schizogony sexual: gametes, zygote Protozoa habitat

Eukaryotic Life Cycles/Histories and some protists (adult) Spores

P: Fornicata Diplomanada = diplomonads: Giardia lamblia

P: Parabasala Trichomonas vaginalis

P: Euglenozoa/phyta Euglenids Euglena

Secondary endosymbiosis

Kinetoplastids trypanosomes = hemoflagellates Trypanosoma brucei gambiense T. brucei rhodesiense T. cruzi

mucocutaneous form cutaneous form Kinetoplastids trypanosomes = hemoflagellates Leishmania also a visceral (organ-attacking) form

Alveolates P: Ciliophora = ciliates Didinium Paramecium

ciliate conjugation

Vorticella

Alveolates P: Apicomplexans

Plasmodium P. falciparum, P. vivax, P. ovale & P. malariae

Cyclospora cayetensis

Toxoplasma gondii

Alveolates P: Pyrrophyta = Dinoflagellates red tide Peridinium

long exposure from Vieques Island, PR At UCSB 2003 Lingulodinium/Gonyaulax

Alexandrium -> PSP Karenia/Gymnodinium breve -> NSP Pfiesteria -> PEAS

Cercozoa P: Foraminifera (forams) CaCO 3 shells

Cercozoa P: Radiolarians silica shells

P: Amoebozoa = amoebas ery/pondscum/protozoa/amoeba/index.html

Acanthamoeba

Naegleria fowleri

EID: Balamuthia mandrillaria

Plasmodial slime mold: Physarum

Cellular slime mold: Dictyostelium

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