Ch #1 - Endosymbiotic Theory

Endosymbiotic Theory

• Explains how eukaryotic cells could have evolved from prokaryotic cells

• Prokaryote Symbiosis = Organisms once lived together

Step #1

• Infoldings in the plasma membrane make internal membranes

  • Internal Membranes = Nucleus and Endoplasmic Reticulum

• Large bacteria/eukaryote lives on its own

• Small prokaryotes live on their own

Step #2

• Large bacteria/eukaryote and small prokaryotes find each other

Step #3

• Large bacteria/eukaryote engulfs the small prokaryotes

• Uses O2 to make energy that evolves into mitochondria

Step #4

• Symbiosis occurs

• Symbiosis = Large bacteria/eukaryotes and small prokaryotes live cooperatively

• Photosynthetic bacteria evolves into chloroplasts

Step #5

• Small prokaryotes live as one with the large bacteria/eukaryotes