Semi-dwarf wheat was first developed by......

Which characteristics are present in cotton varieties that do not attract bollworms?
$(i)$ Smooth leaves
$(ii)$ Hairy leaves
$(iii)$ Stem thorns
$(iv)$ Nectar-containing
$(v)$ Low aspartic acid
$(vi)$ Nectar-less

Which insects are resistant to cotton plants having hairy leaves?

Which of the following pests are not attracted to cotton varieties with smooth leaves and nectarless flowers?

Explain variants or mutation as a method of disease resistance.

The product of hybridization is known as