the eukaryotes 12a: protozoans. eukaryotes in general cells chromosomes made of chromatin cell...
TRANSCRIPT
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The Eukaryotes 12a: Protozoans
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Eukaryotes in general
cells
chromosomes made of chromatin
cell division: mitosis & cytokinesis
(if) sexual reproduction
meiosis
fertilization
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http://tolweb.org/Eukaryotes/3
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Kingdom Protista
highly diverse; may be more than 1
mostly unicellular
2 “lifestyles”
photoautotrophic: algae
chemohetero & often mobile: protozoa
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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
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budding
coenocyte
schizogony
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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
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Eukaryotic Life Cycles/Histories
and some protists
(adult) (adult)
(adult)
(adult)
Spores
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http://tolweb.org/Eukaryotes/3
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P: Fornicata
Diplomanada = diplomonads:
Giardia lamblia
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http://tolweb.org/Eukaryotes/3
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P: Parabasala
Trichomonas vaginalis
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http://tolweb.org/Eukaryotes/3
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P: Euglenozoa/phyta
Euglenids
Euglena
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Secondary endosymbiosis
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Kinetoplastids
trypanosomes = hemoflagellates
Trypanosoma brucei gambiense
T. brucei rhodesiense
T. cruzi
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mucocutaneous form
cutaneous formKinetoplastids
trypanosomes = hemoflagellates
Leishmania
also a visceral (organ-attacking) form
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http://tolweb.org/Eukaryotes/3
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Alveolates
P: Ciliophora = ciliates Didinium
Paramecium
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ciliate conjugation
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Vorticella
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Alveolates
P: Apicomplexans
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Plasmodium
P. falciparum, P. vivax, P. ovale & P. malariae
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Cyclospora cayetensis
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Toxoplasma gondii
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Alveolates
P: Pyrrophyta = Dinoflagellates
red tide
Peridinium
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long exposure from Vieques Island, PRAt UCSB
2003
Lingulodinium/Gonyaulax
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Alexandrium -> PSP
Karenia/Gymnodinium breve -> NSP
Pfiesteria -> PEAS
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http://tolweb.org/Eukaryotes/3
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Cercozoa
P: Foraminifera (forams)
CaCO3 shells
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Cercozoa
P: Radiolarians
silica shells
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http://tolweb.org/Eukaryotes/3
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P: Amoebozoa = amoebas
http://micro.magnet.fsu.edu/moviegallery/pondscum/protozoa/amoeba/index.html
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Acanthamoeba
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Naegleria fowleri
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EID: Balamuthia mandrillaria
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Plasmodial slime mold: Physarum
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Cellular slime mold: Dictyostelium