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Q.
Which one of the following is explained by the endosymbiotic therory
KVPYKVPY 2019
Solution:
The origin of mitochondria and chloroplast are explained by endosymbiotic theory. This theory first postulated by Lynn Margulis in $1967$. Mitochondria and chloroplast are eukaryotic cell organelles with bacterial characteristics. According to this theory eukaryotic mitochondria evolved from a small, prokaryotic autotrophic bacterium that was engulfed by large primitive heterotrophic eukaryotic cell. Endosymbiosis of chloroplast occurs when a cell engulfed a photosynthetic cyanobacterium.