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NEET UG BIOLOGY MCQ: ORGANISMS AND POPULATION
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Which of the following is an example of a defence used by plants against herbivores?
I. Production of caffeine, tannin quinine
II. More production of non-woody tissues
III. Productions of hairs, thorns, spines
IV. Production of hormone-like chemicals that interfere with insect metamorphosis
Select the correct pair
I. Production of caffeine, tannin quinine
II. More production of non-woody tissues
III. Productions of hairs, thorns, spines
IV. Production of hormone-like chemicals that interfere with insect metamorphosis
Select the correct pair
View answer and explanation
Correct option: D
I, III and IV
Option D (I, III and IV) is correct because caffeine, tannins, and quinine are defensive chemicals, hairs/thorns/spines provide physical defense, and hormone-like chemicals disrupt insect development.
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II. Population cover area of banyan is high
III. In above cases the percentage of cover of biomass is more meaningful than population size