Which of the following statements about the evolution of eukaryotic chloroplasts

Question

Which of the following statements about the evolution of eukaryotic chloroplasts and mitochondria is not true?

A) both organelles are derived from Endosymbioses that occurred in the most recent common ancestor of all eukaryotes

B) both organelles are derived from free living bacteria that was engulfed by host cells

C) natural selection favored the retention of chloroplasts in eukaryotic cells because the ability to synthesize sugar using energy from the sun is a significant adaptive advantage

D) natural selection favored the retention of mitochondria in eukaryotic cells because the increased ability to produce ATP is a significant adaptive advantage

Explanation / Answer

Ans:

Endosymbiosis refers to the event which led to formation of mitochondria and chloroplast.

One proto eukaryote engulfed a bacteria which could increase ATP production (mitochondria).

Later, some cells in the lineage acquired another bacteria that could use light to make sugar (glucose) from CO2 (Chloroplast ).

Thus correct choice should be :

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