Fixed time is required for which steps of cell cycle
Actually option A,B,D are answers Ref Gray's anatomy 38th/e p55 The time taken for S,G1,and M phases are similar for most cell types, occupying about 6,4,2 hrs The duration of G1 shows considerable variation.it can be as sho as 2 hrs in rapidly dividing cells like embryonic tissue or as long as 12hrs in some adult tissues G1 phase is most variable because,in this phase cells are not committed to DNA replication . They can either enter resting state or progress to next cell division
S
M
G1
G2
General anatomy