When the adults have reach a certain degree of weakness, the process of binary fission is replaced by conjugation in
Answer Details
Binary fission and conjugation are two different processes of reproduction in single-celled organisms. Binary fission is a simple type of asexual reproduction in which a single cell divides into two daughter cells. On the other hand, conjugation is a type of sexual reproduction that occurs in some single-celled organisms, including the protozoan Paramecium.
In Paramecium, when the cells reach a certain level of maturity or stress, they may engage in conjugation instead of binary fission. During conjugation, two Paramecium cells temporarily join together and exchange genetic material. This process allows for genetic diversity and can help the organisms adapt to changing environments.
So to answer the question, when the adults have reached a certain degree of weakness, the process of binary fission is replaced by conjugation in Paramecium.