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Solution


Q.

Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (Bt) is resistant to:       [2020]
1 insect pests  
2 fungal diseases  
3 plant nematodes  
4 insect predators  

Ans.

(1)

Bt cotton is resistant to cotton bollworm infestation. The genes cry I Ac and cry IIAb control cotton bollworms, thus acting as bio-pesticide.