1. Endosymbiosis Examine these diagrams showing
how an ancestor to eukaryotic cells may have engulfed smaller heterotrophic prokaryotic cells that began producing ATP for it
Endosymbiosis
heterotrophic eukaryote
An ancestor to green algae and plants may have engulfed smaller autotrophic prokaryotic cells that produce sugar using light energy
The outer membrane of plastids may have come from the host cell membrane

2. Explain the Endosymbiosis Theory
NAME
PERIOD
Explain how chloroplasts and mitochondria are thought to have originated as prokaryotic cells that were engulfed by larger primitive eukaryotic cells by presenting similarities among plastids and prokaryotic cells
Describe the process of engulfment that normally makes vesicles and may have led to mitochondria
Explain what the host cell provides to mitochondria and what the mitochondria gives back
Describe the further process of engulfment that may have led to choloroplasts
Explain what the host cell with mitochondria provides to the chloroplast, and what the chloroplast gives back
Explain each piece of evidence that plastids originated as separate prokaryotic cells
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