AP BIOLOGY

Detailed explanation-1: -In addition to the lack of histones, mitochondria and chloroplasts have circular, single stranded DNA. Single stranded, circular DNA is found exclusively in prokaryotes. This evidence supports the endosymbiosis theory because these characteristics would allow the mitochondria and chloroplasts to survive on their own.

Detailed explanation-2: -Abundant evidence has been found for endosymbiosis: Mitochondria and chloroplasts divide by binary fission (a form of asexual reproduction), just as bacteria do, and not by mitosis as Eukaryotes do. Mitochondria arise from preexisting mitochondria; chloroplasts arise from preexisting chloroplasts.

Detailed explanation-3: -Most important are the many striking similarities between prokaryotes (like bacteria) and mitochondria: Membranes-Mitochondria have their own cell membranes, just like a prokaryotic cell does. DNA-Each mitochondrion has its own circular DNA genome, like a bacteria’s genome, but much smaller.