Which of the following is considered the most primary and essential need among the basic requirements of humans?

What is a young chicken raised specifically for meat production called?

What is the scientific name of the Oak Silkworm?

Identify the incorrect statement.

Consider the following statements:
$I$. Solid stem in wheat exhibits non-preference by stem sawfly.
$II$. In cotton,smooth leaf and absence of nectar repel bollworms.
$III$. In maize,high aspartic acid,low nitrogen and sugar content protect them from stem borers.
Which of the statements given above are correct?

Heterosis is . . . . . . .