In $DNA$,the complementary bases are

What is common between vegetative reproduction and apomixis?

Which of the following hormones is a derivative of an amino acid?

Consider the following statements:
$(a)$ $R_2SiO$ is the repeating unit of linear silicones.
$(b)$ $RSiCl_3$ on hydrolysis followed by dehydration gives linear silicones.
$(c)$ Silicones can be used as heat insulators.
$(d)$ Silica is soluble in $HF$.
The correct statement$(s)$ is/are:

The $IUPAC$ name for the complex $[Co(NO_2)(NH_3)_5]Cl_2$ is:

$2 \tanh^{-1} \frac{1}{2}$ is equal to