In which of the following does mitosis not occur?

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

Polytene chromosomes in salivary glands are formed as a result of:

Identify the correct statements: $(1)$ Synapsis occurs between homologous chromosomes during prophase $I$ of meiosis. $(2)$ Centromeres split during anaphase $I$ of meiosis. $(3)$ Spindle fibers completely disappear during telophase of mitosis. $(4)$ Nucleoli reappear during telophase $I$ of meiosis.

Distinguish between cytokinesis and karyokinesis.

Which stages of cell division do the following figures '$A$' and '$B$' represent respectively?