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Solution


Q.

Secondary metabolites such as nicotine, strychnine, and caffeine are produced by plants for their   [2020]
1 nutritive value  
2 growth response  
3 defence action  
4 effect on reproduction  

Ans.

(3)

Nicotine, strychnine, and caffeine are examples of alkaloids. These are secondary metabolites produced by plants for defense against herbivores and pathogens