The Domains of Life

How the evolutionary tree branches over time forms the basis for biological classification. As our understanding of evolutionary history has improved, classification has gone from a two kingdom system (plants and animals), to five kingdoms (plant, animal, fungi, protist, and monera--the kingdom of prokaryotic cells), the classification found in many biology textbooks. Molecular techniques have now clarified the early branching of life, resulting in a useful new overview that splits life into three domains: Archaea (bacteria-like in appearance, but with different biochemistry), Bacteria, and Eucarya, the domain of organisms having cells with nuclei and membrane-bound organelles. This program introduces the three domains and focuses on the main events in the evolution of eukaryotic cells.
Life's Three Great BranchesRunning Time: 0:28:00

Chapter 1: Self-Replicating Molecules Evolve Chapter 2: Domain Bacteria Chapter 3: Domain Eucarya Chapter 4: The Evolution of Mitochondria Chapter 5: The Eukaryotic Cell Evolves Chapter 6: Motor Proteins Get Cells Moving Chapter 7: The Evolution of Plastids Chapter 8: The Invention of Sex Chapter 9: Eucarya Becomes Multicellular

Chapter List
1.) Chapter 1: Self-Replicating Molecules Evolve
00:03:13Early Cells: A cell containing DNA becomes the ancestor for the three existing lines of life.
2.) Chapter 2: Domain Bacteria
00:04:29Domain Bacteria: Anatomy of the bacterial cell and the roles bacteria play in the biosphere.
3.) Chapter 3: Domain Eucarya
00:02:23Domain Eucarya: Complex nucleated cells get their start by engulfing their neighbors.
4.) Chapter 4: The Evolution of Mitochondria
00:02:08The Evolution of Mitochondria: Symbiotic bacteria evolve into the eukaryotic cell's energy transformers.
5.) Chapter 5: The Eukaryotic Cell Evolves
00:01:27The Eukaryotic Cell Evolves: Further developments in cell evolution.
6.) Chapter 6: Motor Proteins Get Cells Moving
00:03:19Motor Proteins Get Cells Moving: Microtubules and other proteins move materials around cells and provide cell locomotion.
7.) Chapter 7: The Evolution of Plastids
00:04:26The Evolution of Plastids: Light harvesting bacteria, living symbiotically with eukaryotic cells, evolve into chloroplasts.
8.) Chapter 8: The Invention of Sex
00:04:13The Invention of Sex: Mixing of genetic material between individuals creates variety and speeds up evolution.
9.) Chapter 9: Eucarya Becomes Multicellular
00:01:46Eucarya Becomes Multicellular: Simple colonies bridge the gap between single cells and multicellular organisms.
Series SKUBDL
Video Programs1
SubjectsScience, Biology
Supplemental Files8
Released2006
Produced By BioMEDIA Associates
Copyright ©2006 BioMEDIA
Grade Levels10th Grade through Post Secondary
MARC Records for BDL
MARC records for the Full Series BDL, The Domains of Life
Domains of Life - Educators Guide Part 1
Domains of Life - Educators Guide Part 2
Domains of Life - Activities
Domains of Life - Quizes
Three Domains of Life - Table of Comparison
Very Brief Timeline of Life on Earth
Glossary