What kingdom contains organisms that are both unicellular and eukaryotic?

The kingdom that contains unicellular and eukaryotic organisms is the Kingdom Protista. Protists are a diverse group of organisms that include single-celled organisms such as amoebas, paramecia, and algae. They are primarily aquatic, but can also be found in damp soil or on the surfaces of plants and animals. Protists are considered to be the most primitive eukaryotic organisms and exhibit a wide variety of morphologies and lifestyles.