Which phase or mitosis is shown here?

Metaphase

Explanation:

Centromeres of each chromosome attach to spindle fibers. The spindle fibers pull the chromosomes into a line along  the equator of the cell.

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

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%