Some organelles in eukaryotic cells are thought to have
A) originated from extracellular symbiotic relationships.
B) their own endoplasmic reticulum.
C) their own mitochondria.
D) originated from endosymbiotic relationships.
E) the ability to live free from the host cell.

Question

Quizplus · Accepted Answer

Organelles such as mitochondria and chloroplasts are thought to have originated from endosymbiotic relationships between ancient bacterial cells and early eukaryotic cells, in which the bacterial cells were engulfed by the eukaryotic cells and eventually evolved into the specialized organelles we see today.

Some Organelles in Eukaryotic Cells Are Thought to Have