Two organelles that are believed to be remnants of unicellular bacteria are:
A) flagella and ribosomes.
B) mitochondria and ER.
C) ribosomes and chloroplasts.
D) mitochondria and chloroplasts.
E) ER and flagella.

Question

Quizplus · Accepted Answer

Mitochondria and chloroplasts are believed to be remnants of unicellular bacteria due to the endosymbiotic theory, which suggests that these organelles were once independent prokaryotic organisms that were engulfed by a host cell.

Two Organelles That Are Believed to Be Remnants of Unicellular