Question

what is binary fission​

Answer 1

Fission, in biology, is the division of a single entity into two or more parts and the regeneration of those parts to separate entities resembling the original. The object experiencing fission is usually a cell, but the term may also refer to how organisms, bodies, populations, or species split into discrete parts.

Answer 2

A mode of asexual reproduction in which organism give birth to new young ones by splitting into two identical parts.

Here's the required answer to your question