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Biology Microbes in Human Welfare Previous Year Questions Single Correct MCQ
Published on: August 21, 2026

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

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

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Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants as defence action against grazers and browsers.

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