Post on 05-Jan-2016
Chapter 28
Evolution of Eukaryotic Diversity
Kingdom Protista
History of Classification
I. Endosymbiotic Theory
II. Kingdom Protista
Most diverse of all kingdoms
Classification difficult; created more for convenience
A. General Characteristics Eukaryotic Most single-celled, some colonial, some
multicellular Neither animals, plants or fungi Auto or heterotrophs; some mixotrophs Many have either cilia or flagella with 9+2
microtubule arrangement at some point in life cycle
Varied life cycle: alternation of generation, to predominant multicellular diploid life, or predominant multicellular haploid life
B. 3 Major Categories
1. Animal-like (protozoa)
2. Algae or plant-like (photosynthetic)
3. Fungal-like
III. Animal-Like Protists
Called Protozoa May have given rise to animals Asexual or sexual reproduction Many form cysts (resistant bodies) and wait
out stressful conditions Usually non-photosynthetic heterotrophs
Rhizopoda(Amoeba)
amoeba video
Actinopoda(Actinopods, Foraminiferans)
ForaminifeanRadiolarian
Zoomastigina(zooflagellates)
Giardia lamblia Trypansoma Trichomonas vaginalis
Ciliophora(Ciliates) Stentor Video
Apicomplexa(Sporozoa)
IV. Algae and Plant-like Protists
Photosynthetic!! Many have flagella and are often mistaken to
be animal-like protists All have chll a, carotenoids, other forms of
chll, and other accessory pigments Not considered true plants due to lack of
plant structures such as a waxy cuticle
Euglenophyta(Euglenoids) videos
Dinoflagellata(Dinoflagellates) video
Bacillariophyta(Diatoms) video
Chrysophyta(Golden Algae)
Chlorophyta(Green Algae)
Volvox Video
Phaeophyta(Brown Algae)
Rhodophyta(Red Algae)
V. Fungal-like Protists
Form filaments (spore-bearing bodies) similar to fungus
Acrasiomycota(cellular slime molds)
Myxomycota(Plasmodial Slime Molds)video
Oomycota(Water molds, downey mildews, white rust)