​Archaea

​Characteristics:

​- Prokaryotes: No nucleus, unicellular, and no membrane bound organelles.

​- Known for living in harsh environment.

​Bacteria

​​Characteristics:

​- Prokaryotes: No nucleus, unicellular, and no membrane bound organelles.

​- Bacteria are the organisms known for making people sick, but some of these organisms are helpful.

​- Cell wall contains peptidoglycan

​Eukarya

​Characteristics:

​- All are Eukaryotes: Have nucleus, and other membrane organelles.

​- Many are multicellular

​- Some are unicellular

​- Examples: All plants, Humans, Mushrooms, and amoebas.