Question

According to the endosymbiosis theory of the origin of eukaryotic cells, how did mitochondria originate?

Answer 1

Answer:

Mitochondria originated when an ameoba like organism engulfed an aerobic proteobacterium capable of cellular respiration.

Explanation:

Endosymbiotic Theory:

• The endosymbiotic theory explains the origin of eukaryotic cells and eukaryotic organelles, particularly the chloroplast and mitochondria.
• According to this theory, a prokaryotic ameoba like organism increased in size and gradually developed infoldings of its plasma membrane. These infoldings gradually developed into an endomembrane that enclosed the genetic material and nucleus.
• This cell then engulfed a proteobacterium capable of cellular respiration. Over time, this cell thrived as oxygen increased in the atmosphere of the Earth. The proteobacterium survived as an endosymbiont and later evolved into mitochondria.