The endosymbiotic hypothesis concerns the origin of mitochondria and chloroplasts, two organelles contained within various eukaryotic cells. According to this hypothesis, these organelles originated as separate prokaryotic organisms that were taken inside a primordial eukaryotic cell.
<span>D. That they variable is staying the same.
Hope this helps (:
-Payshence xoxo</span>
D I believe but im not sure