Which structure is generally not observed in the dividing cells of higher plants?

In which phase is the cell shown below?

The major event that occurs during the $Anaphase$ of mitosis,which brings about the equal distribution of chromosomes is

Select the correct option on the basis of the following events:
$(I)$ Chromosomes cluster at opposite spindle poles.
$(II)$ Nuclear envelope assembles around the chromosome clusters.
$(III)$ Golgi complex and $ER$ reform.

In which stage does a chromatid become known as a chromosome?

When dividing cells are examined under a light microscope,chromosomes become visible in