Endosymbiosis refers to the process in which prokaryotes live within eukaryote hosts. The endosymbiosis model of mitochondria and chloroplast evolution states that mitochondria and chloroplasts are derived from prokaryotes that were engulfed by eukaryotes or that entered eukaryotic cells as parasites. Determine which three of the following statements describe evidence that supports the endosymbiosis model. Check all that apply.

a. Modern examples of endosymbiosis exist, including bacteria that live in the guts of host insects.
b. Mitochondria and chloroplasts replicate by binary fission.
c. Mitochondrial and chloroplast DNA is associated with histone proteins.
d. Mitochondria and chloroplasts have evolved to be smaller than their prokaryotic ancestors.
e. Prokaryotic ribosomes are similar in size to mitochondrial and chloroplast ribosomes.