Which organelle controls the activities of the cell?

If the centromere is situated slightly away from the middle of the chromosome, resulting in one shorter arm and one longer arm, such a chromosome is called .......

Karyolymph is a

What do $a$ and $b$ represent in the given figure,respectively?

Match the organism with the correct number of chromosomes present in its somatic cells.

List-$I$	List-$II$
$(a)$ Human	$(1)$ $24$
$(b)$ Apple	$(2)$ $20$
$(c)$ Maize	$(3)$ $34$
$(d)$ Rice	$(4)$ $46$

Who coined the term $chromatin$?