The three domains of life are Bacteria, Archaea, and Eukarya.
- Bacteria: This domain contains prokaryotic cells. Bacteria are single-celled organisms that lack a nucleus and other membrane-bound organelles.
- Archaea: Similar to Bacteria, Archaea also contains prokaryotic cells. However, Archaea have distinct biochemistry and genetics that set them apart, often thriving in extreme environments.
- Eukarya: This domain consists of eukaryotic cells, which are more complex and contain a nucleus and membrane-bound organelles. Eukarya includes animals, plants, fungi, and protists.
Understanding these domains is fundamental in biology as they represent the basic categories that classify all living organisms based on cellular structure and genetic characteristics.