GED Science TestLife ScienceMedium
A biologist is studying a population of brightly colored frogs in a rainforest. She observes that these frogs have a potent toxin in their skin, which deters predators. This defense mechanism, combined with their vivid coloration, is an example of which evolutionary strategy?
- AMimicry
- BCamouflage
- CSexual selection
- DAposematism
Show answer & explanationAnswer & explanation
Correct answer: D. Aposematism
Aposematism, or warning coloration, is an antipredator strategy where an animal exhibits conspicuous signals (like bright colors) to advertise its unpalatability or toxicity to potential predators.
Why the other options are wrong
- A. Mimicry involves one species evolving to resemble another, often a toxic one, which isn't the primary description here for the toxic frog itself.
- B. Camouflage involves blending in with the environment to avoid detection, which is the opposite of bright coloration.
- C. Sexual selection relates to traits that increase mating success, not direct defense against predators.
Aposematism
A warning signal, often vivid coloration, given by an animal to advertise its unpalatability, toxicity, or danger to potential predators.
- Serves as an antipredator defense mechanism.
- Often involves bright, contrasting colors (e.g., red, yellow, black).
- Predators learn to avoid such signals after negative experiences.
Memory trick: Aposematism is like a 'Danger! Keep Out!' sign.