Which of the following does not occur during interphase?

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?

What is a kinetochore?

$DNA$ replication occurs in .........

Which of the following types of cell division is a characteristic feature of chondrocytes,the macronucleus of Paramecium,and embryonic membranes?

While examining the mitotic stage in a tissue,one finds some cells with $16$ chromosomes and some with $32$ chromosomes. What possible reasons could you assign to this difference in chromosome number? Do you think cells with $16$ chromosomes could have arisen from cells with $32$ chromosomes or vice versa?