WAEC 2019 Biology · Question 24

The yellow and black stripes on the body of wasps is an example of________

Options

  1. A.mimicry
  2. B.courtship behaviour
  3. C.camouflage
  4. 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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