What must occur during the cell cycle to ensure proper division of the chromosomes?

DNA replication, if the chromosomes didn't replicate, there could be a mutation in the division.

Ifound this information on google “yes. they have a mouth and brain at one end and an anus at the opposite end. what characteristics distinguish an annelid from other worms? annelids have segmented bodies and a coelem which is a tube filled with fluid and contains most of the organs.“ i hope it you

It would be a rusting car, for sure