Organelles such as mitochondria and chloroplasts are thought to have originated in eukaryotic cells via a process called
A) phagocytosis.
B) endosymbiosis.
C) endocytosis.
D) exocytosis.

Question

Quizplus · Accepted Answer

Mitochondria and chloroplasts are thought to have originated in eukaryotic cells through a process called endosymbiosis, in which a prokaryotic organism is engulfed by a eukaryotic cell and evolves over time to become a permanent resident within the host cell. This process eventually gave rise to modern-day mitochondria and chloroplasts, which share many characteristics with bacterial cells and have their own DNA and ribosomes.

Organelles Such as Mitochondria and Chloroplasts Are Thought to Have