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Question : Read of the following statements:- (a) Insect resistance in crop plants may be due to morphological, biochemical or playsiological characteristics. (b) Hairy leaves in cotton are resistant to cereals jassids. (c) Smooth leaves and nectar-less cotton varieties do not attract bollworms. (d) In maize, high asparatic acids, low nitrogen and sugar leads to resistance to stemborers. Choose correct statements :- |
| Answer» Answer :D | |