Which of the statements are true of endosymbiotic theory?
a) explains the origin of all organelles found within a eukaryotic cell
b) provides insight about why chloroplasts can survive outside of a eukaryotic cell
c) explains the origin of some eukaryotic organelles, such as mitochondria
d) explains why chloroplasts contain circular DNA similar to bacteria
e) states that an ancestral eukaryotic cell engulfed a photosynthetic protobacteria
