Respuesta :
Answer:
When a single-celled organism splits into 2 new organisms it is called fission.
Answer:
A) Fission
Explanation:
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 fission may be binary fission, in which a single organism produces two parts, or multiple fission, in which a single entity produces multiple parts.