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Question

Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their 


A
Growth response
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B
Defence action
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C
Effect on reproduction
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D
Nutritive value
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Solution

The correct option is A Defence action
Secondary metabolites nicotine produced by the tobacco plants, Strychnine produced by Strychnos nux-vomica, and caffeine produced majorly by coffee plants. These secondary metabolites are alkaloids for defending themselves from herbivores.
So, the correct answer is 'Defence action'.

Biology

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