The hypothesis that mitochondria and chloroplasts evolved from bacteria is called
A) endosymbiont hypothesis.
B) RNA world hypothesis.
C) ribozyme engulfment hypothesis.
D) exosymbiont hypothesis.
E) organellization hypothesis.

Question

The hypothesis that mitochondria and chloroplasts evolved from bacteria is called  
A) endosymbiont hypothesis.
B) RNA world hypothesis.
C) ribozyme engulfment hypothesis.
D) exosymbiont hypothesis.
E) organellization hypothesis.

Quizplus · Accepted Answer

The hypothesis that mitochondria and chloroplasts were originally free-living bacteria that were engulfed by ancestral eukaryotic cells and evolved into the present-day organelles is known as the endosymbiont hypothesis.

The Hypothesis That Mitochondria and Chloroplasts Evolved from Bacteria Is