Question

what is the s phase?
the phase of the cell cycle where cells grow and prepare to divide
the phase of the cell cycle where a cell actively divides into two identical cells
the phase of the cell cycle where cells synthesize, or create, an identical copy of their dna
a process by which a cell pinches together in the middle to separate into two individual cells

Explanation:

The cell cycle has different phases. The S phase stands for the synthesis phase. In this phase, the cell's main activity is to replicate its DNA. This is crucial for cell division as each new cell needs a complete set of genetic information.
The first option describes the G1 phase (growth and preparation). The second option describes the M phase (mitosis - active division). The fourth option describes cytokinesis (the physical separation of the cell).

Answer:

The phase of the cell cycle where cells synthesize, or create, an identical copy of their DNA