The domain Eukarya includes four recognized kingdoms:
- Animalia: This kingdom encompasses all animals, ranging from simple organisms like sponges to more complex beings such as mammals and birds.
- Plantae: The kingdom Plantae includes all plants, which are primarily characterized by their ability to perform photosynthesis.
- Fungi: This kingdom is made up of fungi, including yeasts, molds, and mushrooms, which play a crucial role in decomposition and nutrient cycling.
- Protista: Protista acts as a catch-all kingdom for eukaryotic organisms that do not fit into the other three kingdoms, including various unicellular and simple multicellular organisms.
Each of these kingdoms is defined by distinct features that separate them from one another, showcasing the vast diversity within the domain Eukarya.