Identify the mitotic stage from the given features.
(i) Nuclear envelope degenerates completely.
(ii) Chromosomes are spread throughout the cytoplasm.
(iii) Fully formed spindle apparatus consists of fine fibres.
The complete disintegration of the nuclear envelope is observed in the prometaphase of mitosis, hence the chromosomes are spread through the cytoplasm of the cell. In this phase fully formed spindle apparatus consists of fine fibres.