Protists and the Origin of Eukaryotes
Topics
Reminders
1. Introduction
2. Morphology of Protists
3. Motility of Protists
4. Reproduction
5. Metabolic diversity
6. Origin of Eukaryotes
7. Protozoa
8. Algae
9. Fungus-Like Protists
[Return to Syllabus]
Reminders
- Eukaryotic Origins
- chp 26, pp 533-551
- Emphasis: class outline
- Study Outline: pp 556-567
- Self Quiz: 557-558
[Topics]
1. Introduction
- Kingdom of Protista
- origin of eukaryotes
- fig. 26.2
- endosymbiotic model
- diversity
- habitats
[Topics]
2. Morphology of Protists
- unicellular, acellular and multicellular
- complex cells, membrane-bounded organelles
- nuclei, mitochondria, chloroplasts, vacuoles
- extracellular matrix or cell wall
[Topics]
3. Motility of Protists
- motility
- contractile fibers
- flagella
- cilia
- amoeboid movements
- none
- diatoms
[Topics]
4. Reproduction
- asexual reproduction
- sexual reproduction
- meiosis
- gametes may be present
- conjugation
- multicellular algae life cycle
[Topics]
5. Metabolic diversity
- chemoheterotrophs
- aerobic respiration
- anaerobic respiration
- photoautotrophs
[Topics]
6. Origin of Eukaryotes
- the Antiquity of Eukaryotes
- prokaryotes: 3.8 billion years ago
- appearance of eukaryotes: probably 1.5 - 2.0 billion years ago
- oxygen revolution
[Topics]
7. Protozoa
- Phylum Rhizopoda
- amoeba
- pseudopods
- gel-sol
- contractile vacuoles
- Phylum Foraminifera
- porous shells - calcium carbonate
- strands of cytoplasm
- white cliffs of Dover
- Phylum Apicomplexa
- sporozoan
- complicated life cycle
- Plasmodium
- Phylum Zoomastigophora
- flagella, one or more
- some parasitic
- Trypanosoma, African sleeping sickness
- Phylum Ciliophora
- cilia, numerous
- metachromatic wave
- macronucleus
- micronucleus
- Paramecium
[Topics]
8. Algae
- photosynthetic pigments
- mixotrophic
- table 26.2
- Phylum Dinoflagellata
- red tide
- internal plates of cellulose
- whirling swimming motion
- Phylum Bacillariophyta
- diatoms
- unique glass-like wall
- gliding motion
- Phylum Euglenophyta
- Euglena
- flagella
- autotroph or heterotroph
- Phylum Chlorophyta
- grass green chloroplasts
- store starch
- Chlamydomonas
- Volvox
- Phylum Phaeophyta
[Topics]
9. Fungus-Like Protists
- Phylum Myxomycota
- Phylum Acrasiomycota
[Topics]