Bacteria divide every $35$ minutes. If a culture containing $10^5$ cells $/ ml$ grows for $175$ minutes,what will be the cell concentration per $ml$ after $175$ minutes?

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

Match the following events that occur in their respective phases of cell cycle and select the correct option:

Column $I$	Column $II$
$(a)$ $G_{1}$ phase	$(i)$ Cell grows and organelle duplication
$(b)$ $S$ phase	$(ii)$ $DNA$ replication and chromosome duplication
$(c)$ $G_{2}$ phase	$(iii)$ Cytoplasmic growth
$(d)$ Metaphase in $M$-phase	$(iv)$ Alignment of chromosomes

Mitosis occurs in

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.

Analogy type question:
$(1)$ Zygotene : Synapsis :: Pachytene : .......
$(2)$ Prophase-$I$ : Diakinesis :: Interval between two successive meiotic divisions : .......