The persistence of the nuclear envelope and the formation of an intranuclear spindle are characteristic of ..........

$A$ cell at the telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at the telophase stage. There is no formation of a cell plate,and thus the cell contains a higher number of chromosomes compared to other dividing cells. This would result in:

Identify the correct statements.
$(i)$ Somatic cells undergo mitosis,and germ cells undergo meiosis.
$(ii)$ During mitosis,$DNA$ replicates once for one cell division,and in meiosis,$DNA$ replicates twice for two cell divisions.
$(iii)$ Meiosis and mitosis are observed in organisms that reproduce both sexually and asexually.

What is the number of chromosomes in human cells during the following phases: Metaphase,Metaphase-$I$,and Metaphase-$II$,respectively?

The following events occur during the various phases of the cell cycle. Name the phase against each of the events.
$(a)$ Disintegration of nuclear membrane .........
$(b)$ Appearance of nucleolus
$(c)$ Division of centromere
$(d)$ Replication of $DNA$

Mitosis and meiosis take place respectively in