During which phase of the cell cycle is the cell growing and preparing for cellular division? The males of a bird species do a "dance" and "sing a song" each spring. What is the main purpose of these behaviors?

to produce more cells.

Interphase

Cells grow and prepare for cellular division during interphase. This is split into 3 stages, M1, S, and M2.

During m1 the cell grows and prepares. During s, DNA is synthesised (replicated). During m2 the cell continues to grow and prepare.