Answer: Nicotine and quinine.
- A Chlorophyll and starch
- B Nicotine and quinine
- C Cellulose and lignin
- D Glucose and sucrose
Correct answer: B. Nicotine and quinine
Explanation: Plants produce defensive chemicals like nicotine, quinine, strychnine and caffeine that deter or poison grazing herbivores.
Exponential growth produces an ever-steepening J-curve with no limit, an unrealistic long-term model; logistic growth produces an S-curve that levels off at the carrying capacity K, as growth rate (K−N)/K shrinks to zero once resources are fully used.
Concept context
How organisms interact with abiotic factors and respond to stress, plus population attributes, growth models, and interspecific interactions such as predation, competition, and mutualism.