In which phase do the centrosomes move towards opposite poles of the cell?

Which of the following events is associated with anaphase?

$A$: The complete disintegration of the nuclear envelope marks the start of metaphase.
$R$: Chromosomes are distinct with two chromatids at this stage.

Spindle fibers and kinetochores are two important structures for

What is the correct sequence of phases in mitosis?

The metabolic rate of the cell,which decreases during prophase,starts increasing again during which phase?