What is science, including scientific reasoning?

"Science" is the pursuit and application of knowledge and understanding of the natural and social world following a systematic methodology based on evidence.

"Scientific Study" has been defined as a problem-solving process that involves critical thinking in relation to content, procedural, and epistemic knowledge.

For example : Studies in climate changes

as in mitosis, dna replication occurs during interphase.   in meiosis, it occurs specifically in s phase of interphase 1.