5) When did bacteria appear on Earth?

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Bacteria appears about _ billion years ago

3.5

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Prokaryotes evolved over _ billion years before Eukaryotes appeared

2.6 years

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Why does this matter?

Prokaryotes did NOT change and adapted to environmental changes

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Once eukaryotes appears, life changed from

unicellular organisms to multicellular organisms

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What 2 organelles originated from prokaryotes? (theory)

Mitochondria and chloroplasts

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<p>What is the endosymbiotic theory?</p>

What is the endosymbiotic theory?

eukaryotic organelles mitochondria and chloroplast have originated from free-living prokaryotes (2)

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List the 3 domains *

Bacteria, Archaea, and Eukarya