Answer : Binary Fission which grows exponentially.
Explanation : Binary fission actually means binary - consisting two and fission - cleavage into halves. It is one of the modes of asexual reproduction.
This type of fission is majorly observed in the asexual reproduction in prokaryotes. It is rarely seen in some some single-celled Eukaryotes like Amoeba and Paramecium.
Also, In binary fission there is DNA replication and segregation which occurs simultaneously.
This increases the graph exponentially as the growth gets faster and faster with the passing period of time.
A reference image of binary fission is attached in the answer.
