The characteristic features of Kingdom Protista are as follows

(i) This group includes many kinds of eukaryotic unicellular organisms.

(ii) Some of these organisms use appendages, such as hair like cilia or whip like flagella for moving around.

(iii) Their mode of nutrition can be Autotrophic or heterotrophic

(iv) Examples of Protista are unicellular algae, diatoms and Protozoan.