Chloroplasts and Mitochondria both evolved in primitive microorganisms as
<u>they were able to make more use of available energy.</u>
Explanation:
Endosymbiosis involved the engulfing of smaller microorganisms by a larger one. These engulfed organisms and their hosts both had distinct genetic lineages. Mitochondria and Chloroplasts generate large amounts of energy in the form of high-energy ATP or adenosine triphosphate through several steps, the electron transport chains, Krebs and Calvin cycles.
On average, the net gain of ATP from mitochondrial respiration surpasses the energetic gain from the ATP made via glycolysis.
