In which phase of mitosis do the chromatids of each chromosome separate from each other?

What is the metaphase plate?

In the given figure,what do $a$ and $b$ represent respectively?

Karyokinesis differs from cytokinesis because it involves

At which stage of the cell cycle does colchicine arrest the spindle?

Telophase shows the following key events:
$1.$ Chromosomes cluster at opposite spindle poles
$2.$ Spindle fibres attach to kinetochores of chromosomes
$3.$ Nuclear envelope assembles around the chromosome clusters.