WAEC 2019 Biology · Question 24
The yellow and black stripes on the body of wasps is an example of________
Options
- A.mimicry
- B.courtship behaviour
- C.camouflage
- D.warning colouration
Answer: D. warning colouration
Explanation written with AI and checked against the answer key
Step 1: Analyze the question The question asks what the bold yellow and black stripes on a wasp's body represent in biology. This is about adaptive coloration, a topic under adaptation and ecological relationships.
Step 2: Explain the concepts
- Mimicry: One harmless species resembles a harmful or unpleasant species to avoid predators (e.g., a hoverfly that looks like a wasp).
- Courtship behaviour: Actions or displays used to attract a mate.
- Camouflage: Coloration that helps an organism blend into its surroundings so it is hard to see (e.g., a chameleon or stick insect).
- Warning (aposematic) colouration: Bright, conspicuous colours, often yellow, black, or red, that advertise that an animal is dangerous, poisonous, or distasteful. Predators learn to associate the colours with a painful sting or bad taste and avoid the animal.
Step 3: Apply to the wasp Wasps have a sting. Their bright yellow and black stripes make them very noticeable, not hidden. This is the opposite of camouflage. The stripes warn predators such as birds: "Stay away, I can sting you!"
- Not B: stripes are not used mainly for attracting mates.
- Not C: the stripes make the wasp stand out, not blend in.
- A (mimicry) is tempting, but the wasp is the actual dangerous model here, not an imitator. Mimicry would describe a harmless insect copying the wasp's pattern.
Step 4: Answer The stripes advertise danger, so this is warning colouration, which is option D.
Exam tip: Remember "bright = beware." Bright, bold colours (yellow/black, red/black) on a dangerous animal mean warning colouration. Dull colours that match the background mean camouflage. If a harmless animal copies a dangerous one, that is mimicry.
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