Chapter 28 Evolution of Eukaryotic Diversity Kingdom Protista.
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Transcript of Chapter 28 Evolution of Eukaryotic Diversity Kingdom Protista.
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)