Question:
Which of the following is NOT an example of an adaptive defense mechanism against predation?
Which of the following is NOT an example of an adaptive defense mechanism against predation?
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A trait is a defense only if it reduces predation risk — not if it aids pollination or reproduction.
Updated On: Dec 14, 2025
- Bright colors of bird-pollinated flower
- Insect that resembles a stick
- Nicotine in the tobacco plant
- Spines on porcupine
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The Correct Option is A
Solution and Explanation
Step 1: Identify defensive traits.
Defense mechanisms include mimicry, chemical defenses, structural protections, and camouflage — all aimed at avoiding predation.
Step 2: Evaluate each option.
(A) Bright colors attract pollinators, not defend against predators → NOT a defense.
(B) Stick insects use mimicry to hide from predators → defense.
(C) Nicotine is a toxic deterrent to herbivores → defense.
(D) Porcupine spines protect against predators → defense.
Step 3: Conclusion.
Bright floral colors serve reproductive functions, not defensive ones. Hence (A) is the correct answer.
Defense mechanisms include mimicry, chemical defenses, structural protections, and camouflage — all aimed at avoiding predation.
Step 2: Evaluate each option.
(A) Bright colors attract pollinators, not defend against predators → NOT a defense.
(B) Stick insects use mimicry to hide from predators → defense.
(C) Nicotine is a toxic deterrent to herbivores → defense.
(D) Porcupine spines protect against predators → defense.
Step 3: Conclusion.
Bright floral colors serve reproductive functions, not defensive ones. Hence (A) is the correct answer.
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