Chromosomes become short,dense,and distinct,each chromosome consists of a centromere and two chromatids,and the nucleolus and nuclear envelope disappear. During which phase are these changes observed?

Which of the following is not a characteristic of mitosis?

Statement $P$: Centrioles duplicate during the $S$ phase.
Statement $Q$: During prophase,centrioles separate from each other and move towards opposite poles of the cell.

Given below is a schematic representation of the phases/stages of the cell cycle. Which one of the following is the correct indication of the stage/phase in the cell cycle?

Programmed cell death is scientifically termed as

Read the following four statements $[A-D]$:
$(A)$ Growth and reproduction are characteristics of cells,indeed of all living organisms.
$(B)$ In plant cells,during $S$ phase centriole duplicates in the cytoplasm.
$(C)$ Prophase is marked by the initiation of condensation of chromosomal material.
$(D)$ Metaphase - centromere split
How many statements are correct?