What must happen before mitosis can begin?

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity

Explain the cellular functions that occur when antibiotics attack a bacteria cell. a. antibiotics target the cell wall, cell membrane, and the processes of protein and nucleic acids production in bacteria to rupture the cell. b. antibiotics create dormant resistant endospores to preserve the genetic material and rupture the cell. c. antibiotics target the cell wall and form a bridge-like connection to form conjugation. d. antibiotics use binary fission to grow twice its size, replications its dna, and split into two cells.

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?