1. Endosymbiotic Theory

2. The Endosymbiotic Theory
The endosymbiotic theory is the idea that a long time ago, prokaryotic cells ate other prokaryotic cells. This resulted in the first eukaryotic cells.

3. What Exactly Happened? Ancient Prokaryotes
Chloroplast
Plants and plant-like protists
Ancient Prokaryotes
Heterotrophic bacteria
Nuclear envelope evolving
Photosynthetic bacteria
Mitochondrion
Primitive Autotrophic (Photosynthetic) Eukaryote
Animals, fungi, and animal-like protists
Ancient Heterotrophic Prokaryote
Primitive Heterotrophic Eukaryote

4. Membrane-Bound Organelles
Mitochondria = membrane-bound organelle that produces energy for the cell
Chloroplast = membrane-bound organelle that captures sunlight and uses it to make food for the cell

5. Evidence in support of the endosymbiotic theory:
Similarities between mitochondria, chloroplasts, & prokaryotes:
Circular DNA
Ribosomes
Binary fission

6. Check these out:
Animation: Student form with fill-in’s: Worksheet Notes\ENDOSYMBIOSIS student fill-ins.docx