The idea that mitochondria may have resulted when a nucleated cell engulfed aerobic bacteria is known as the
A) chemiosmotic theory.
B) endosymbiotic hypothesis.
C) Lyon hypothesis.
D) theory of evolution by means of acquired characteristics.
E) theory of acquisition of organelles.

Question

Quizplus · Accepted Answer

The endosymbiotic hypothesis proposes that mitochondria were once free-living aerobic bacteria that were engulfed by a nucleated host cell and eventually evolved into a symbiotic relationship, providing energy in exchange for nutrients and protection.

The Idea That Mitochondria May Have Resulted When a Nucleated