Concept:Asexual reproduction in many single-celled organisms occurs by simple cell division.Explanation:Paramecium reproduces asexually by splitting into two daughter cells.This type of asexual reproduction is called binary fission.Many protists, such as Amoeba and Euglena, also reproduce by fission.Thus, fission is the type common to both Paramecium and protists.Answer:D. fission