Which organelle probably originated as an endosymbiotic engulfing of an aerobic bacterium by a eukaryotic cell?
A) ribosome
B) mitochondrion
C) Golgi body
D) nucleus
E) endoplasmic reticulum

Question

Quizplus · Accepted Answer

The mitochondrion most likely originated as an endosymbiotic engulfing of an aerobic bacterium by a eukaryotic cell, as it has its own DNA and can reproduce independently within the eukaryotic cell. Ribosomes are present in both prokaryotic and eukaryotic cells, and the nucleus and endoplasmic reticulum are thought to have arisen through a process of invagination of the cell membrane. The Golgi body, while involved in processing and modifying cellular products like proteins, is not believed to have originated from a bacterial endosymbiosis.

Which Organelle Probably Originated as an Endosymbiotic Engulfing of an Aerobic