Biologyhard · Past Paper
The Endosymbiotic Theory suggests that mitochondria and chloroplasts originated from:
AEnzymatic reactions
BFree-living prokaryotes
CThe nucleus
DThe endoplasmic reticulum
✓ Correct Answer: B — Free-living prokaryotes
Lynn Margulis proposed that these organelles were once independent bacteria that were engulfed by a host cell.
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