What is required to obtain a variety with genetic variation?

Which of the following is not economically useful?

From which plant is a liquid wax obtained that has properties equivalent to sperm whale oil?

In a country like India,what else is required in addition to milk for proper human nutrition?

Which of the following is an incorrect pair?

Select the incorrect statement$(s)$ from the following:
$I -$ Honey is a food of high nutritional value and is also used in the indigenous system of medicine (Ayurveda).
$II -$ Another product of honey bees is beeswax, which is very useful in the industrial sector.
$III -$ The most common species of honey bee is $Apis \text{ } indica$.
$IV -$ Beekeeping involves labor-intensive work.
$V -$ Beehives cannot be kept in courtyards, verandas, or on the roof of a house.
$VI -$ Beekeeping can be practiced in any area where there are sufficient bee pastures of some wild shrubs, fruit orchards, and cultivated crops.