The paragraph describes mitochondria and chloroplasts. which sentence in the paragraph provides the strongest evidence for the endosymbiotic theory of the origin of eukaryotes? (a) mitochondria and chloroplasts are organelles of eukaryotic cells. (b) mitochondria are involved in energy generation and are present in almost all eukaryotic cells. (c) chloroplasts are involved in photosynthesis and are found primarily in plant cells. (d) in both organelles, reactions involved in the transfer of energy take place along the organelle's folded inner membrane. (e ) both organelles can direct their own replication by splitting through a process similar to binary fission.