Which of the Following is Thought to Be the Descendant

Question

Which of the following is thought to be the descendant of ancient bacteria?  
A) Nuclei
B) Golgi bodies
C) ER
D) Mitochondria
E) Lysosomes

Accepted Answer

Mitochondria are thought to be descendants of ancient bacteria that merged with eukaryotic cells through endosymbiosis. This theory is supported by the fact that mitochondria have their own DNA and ribosomes, similar to bacteria, and they reproduce independently within cells. The other organelles listed are not believed to have originated from bacteria.