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Cell Evolution Timeline
Pages 70-81 (Raven and Johnson)
Create a timeline depicting the evolution of cells. At each segment of
your timeline, provide a description of the event and a picture. Your
descriptions should be very detailed. If you mention that the cell was a
prokaryote, you need to define prokaryote. For your pictures, if you
write “extreme thermophiles appeared” then you could draw a picture of
a bacterium in boiling water.
To help you out, here is a list of items you should include. It’s your job to
place them on the timeline and give the descriptions and pictures.
2.5 billion years ago
 Microfossils (include prokaryote, cyanobacteria, squiggles in
Western Australia)
 Archaebacteria (include peptidoglycan)
o Methanogens (include anaerobic, formula for methane
production, habitat)
o Halophiles (include habitat)
o Thermophiles (include habitat, and interesting facts about
Methanococcus DNA sequencing)
2 billion years ago
 Bacteria (include cell wall composition)
o Cyanobacteria (include photosynthesis, blue-green algae,
what they did for the Earth’s atmosphere, limestone
deposits, appearance is filamentous)
1.5 billion years ago
 Eukaryotes (include size, cell structure)
o Endoplasmic reticulum formation
o Endosymbiont hypothesis (include Lynn Margulis, definition,
complete description of the idea)
o Sexual reproduction
o Multicellularity
1665
 Robert Hooke
1700’s
 Anton van Leeuwenhoek
1839
 Schleiden and Schwann
o Cell theory (provide three parts)
Cell Evolution Timeline
Pages 70-81 (Raven and Johnson)
Create a timeline depicting the evolution of cells. At each segment of
your timeline, provide a description of the event and a picture. Your
descriptions should be very detailed. If you mention that the cell was a
prokaryote, you need to define prokaryote. For your pictures, if you
write “extreme thermophiles appeared” then you could draw a picture of
a bacterium in boiling water.
To help you out, here is a list of items you should include. It’s your job to
place them on the timeline and give the descriptions and pictures.
2.5 billion years ago
 Microfossils (include prokaryote, cyanobacteria, squiggles in
Western Australia)
 Archaebacteria (include peptidoglycan)
o Methanogens (include anaerobic, formula for methane
production, habitat)
o Halophiles (include habitat)
o Thermophiles (include habitat, and interesting facts about
Methanococcus DNA sequencing)
2 billion years ago
 Bacteria (include cell wall composition)
o Cyanobacteria (include photosynthesis, blue-green algae,
what they did for the Earth’s atmosphere, limestone
deposits, appearance is filamentous)
1.5 billion years ago
 Eukaryotes (include size, cell structure)
o Endoplasmic reticulum formation
o Endosymbiont hypothesis (include Lynn Margulis, definition,
complete description of the idea)
o Sexual reproduction
o Multicellularity
1665
 Robert Hooke
1700’s
 Anton van Leeuwenhoek
1839
 Schleiden and Schwann
o Cell theory (provide three parts)