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This free living protozoa reproduces by asexual and sexual methods. In Paremoecium, the asexual reproduction is caused by transverse binary fission. Binary Fission: Just before division the animal ceases feeding, the central portion of the body bulges. Micronucleus increases in size and fine spindle fibres are formed. Chromosomes divide eumitotically passing through all the stages [...]

Reproduction in Euglena In E. viridis no sexual reproduction occurs. It reproduces by asexual binary and multiple fissions and undergoes encystment. Under favorable conditions euglenas reproduce by longitudinal binary fission.  The longitudinal binary fission is always symmetrogenic, that is, the parental Euglena divides into two daughter individuals, where one is the plane mirror image of [...]