Name the crop which had its birth place in Tropical America but now the centre of production is Mid-west $USA$.

Which method undergoes continuous changes and improvements over time?

$Leucaena leucocephala$ is:

Give full names for the following abbreviations:
$(1)$ $\text{MOET}$
$(2)$ $\text{IRRI}$
$(3)$ $\text{IARI}$
$(4)$ $\text{SCP}$
$(5)$ $\text{FSH}$

Consider the following statements:
$I$. Semen is preserved for artificial insemination by heating.
$II$. The most common bee species reared in India is $Apis$ $indica$.
$III$. An example of interspecific hybridization is a mule.
Which of the statements given above is/are not correct?

The liquid wax is obtained from: