how do we defferentiate between opisthe and proter after forming into individuals in paramecium?

Paramoecium reproduces asexually by the process of binary fission. In binary fission a single cell splits into two separate cells. There are three types of binary fission – irregular binary fission, longitudinal binary fission and transverse binary fission. In transverse binary fission, the fission occurs transversely or side by side. after fission, among the two cells residing side by side, first one is porter and the second one is opisthe.