What does the endosymbiotic theory state? a. The endosymbiotic theory states tha

Question

What does the endosymbiotic theory state? a. The endosymbiotic theory states that the nucleus and chloroptasts arose independently around 2 billion years ago from bacteria. b. The endosymbiotic theory states that mitochondria and nucleus arose independently around 2 billion years ago from free-living protobacteria. c. The endosymbiotic theory states that mitochondria and chloroplasts arose independently around 2 billion years ago from free-living protobacteria d. The endosymbiotic theory states that cells arose independently around 2 billion years ago from colonies of protobacteria.

Explanation / Answer

The answer is (c).According to endosymbiotic theory, mitochondria are supposed to have evolved in eukaryotes from endosymbiotic association of purple photosynthetic bacteria about 1.5 million years ago.The captured cell was then reduced to a functional organelle bound by two membranes, and was transmitted cytoplasmically to subsequent generations. Chloroplast are also supposed to be evolved from protobacteria.

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