The formation of the nucleolus at the nucleolar organizer region is associated with which phase?

During cell division,the nuclear envelope reforms at which stage?

Which of the following statements (events) is/are true for mitotic telophase?

During telophase, the chromosomes cluster at opposite spindle poles and their identity is lost as discrete elements. What do they transform into at the end of this phase?

At the end of which phase does each chromosome appear to consist of two chromatids joined by a centromere?

$A$ cell spends less than $......\%$ of the total duration of the cell cycle in the $M$ phase.