Variable number of tandem repeats $(VNTRs)$ in the $DNA$ molecule are highly useful in:

Modern farmers have been able to increase rice production by $50\%$ using which of the following?

Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is held at a temperature of $100^{\circ} C$,while the other one is kept at $0^{\circ} C$. If the two are brought into contact,then assuming no heat loss to the environment,the final temperature that they will reach is

$A$ coordination complex contains $Co^{3+}$,$Cl^{-}$,and $NH_3$. When dissolved in water,one mole of this complex gives a total of $3$ moles of ions. The complex is

Which of the following reactions takes place in the Bessemer converter during the extraction of copper?

Water is considered to be polluted if the dissolved oxygen $(D.O.)$ content is less than ... $ppm$ :