Nearly all single-celled eukaryotes that are either heterotrophic or photosynthetic belong to the kingdom 23:51 Biology Nearly all single-celled eukaryotes that are either heterotrophic or photosynthetic belong to the kingdom A. ProtistaB. AnimaliaC. PlantaeD. FungiAnswer: A. Protista Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+