Though both are unicellular, bacteria doesn’t possess a nucleus or cell organelles, except ribosomes, whereas amoebas possess a well-defined nucleus and all essential cell organelles.
Both bacteria and
amoeba are single-celled organisms. They both have ribosomes.
Bacteria is a prokaryote. It lacks membrane-bound nucleus, mitochondria, chloroplasts or any membrane-bound organelles.
Amoeba is a eukaryote. It has a "true" nucleus containing its DNA and organelles which is responsible for energy production and protein transport.
