Consider the following statements:
$I$. The progeny of cross-breeding may be used for commercial production.
$II$. In case of artificial insemination,the semen can be used immediately or can be frozen for later use.
$III$. Controlled breeding experiments are carried out using artificial insemination and multiple ovulation embryo transfer technology.
Which of the statements given above are correct?

Which of the following is considered a pest?

According to $NCERT$ text, which of the following are steps involved in the selection and testing of superior recombinants in plant breeding?

Consider the following statements:
$I$. Breeding of animals is very important for animal husbandry.
$II$. Both the male and female animals selected for breeding should be of superior quality.
$III$. The word 'husbandry' means the management of domestic affairs.
$IV$. In our country,poultry mainly means chickens,domesticated for eggs.
$V$. Cows and buffaloes generally give more milk than goats and sheep.
$VI$. The yellow colour of buffalo milk is due to carotene.
Which of the statements given above are true and which are false?
$I \; II \; III \; IV \; V \; VI$

In view of the current food crisis,it is said that we need another green revolution. Highlight the major limitations of the earlier green revolution.

Crop cultivation was first started in