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Difficulty: MediumStructural Adaptations for Survival: Coloration, Camouflage, and Mimicry

An adult insect species residing on tree trunks exhibits a mottled grey and brown cuticular pattern that makes it virtually indistinguishable from the lichen-covered bark. Conversely, a caterpillar species living in the same habitat displays bright yellow and black high-contrast stripes and releases foul-tasting secretions when attacked. Which of the following correctly classifies the primary defensive survival strategies employed by the adult insect and the caterpillar, respectively?

  1. Cryptic coloration and Aposematic colorationAnswer
  2. B
    Batesian mimicry and Cryptic coloration
  3. C
    Aposematic coloration and Müllerian mimicry
  4. D
    Cryptic coloration and Protective mimicry

Answer

Cryptic coloration for the adult insect and Aposematic coloration for the caterpillar
The adult insect matches the coloration and texture of its environmental substrate (tree bark), which is cryptic coloration. The caterpillar advertises its own unpalatability to predators using conspicuous yellow and black stripes, which is aposematic coloration.

Step-by-Step Solution

1
Analyze the physical appearance and adaptation of the adult insect
The mottled grey and brown coloration allows the insect to blend into the surrounding lichen-covered tree bark, which defines cryptic coloration (camouflage).
Cryptic coloration reduces detection risk by matching the physical background of the organism's habitat.
2
Analyze the physical appearance and defense of the caterpillar
The bright yellow and black pattern coupled with foul-tasting secretions serves to visually warn predators of noxious qualities, which defines aposematic coloration (warning coloration).
Aposematic coloration uses conspicuous visual signals to advertise unpalatability or toxicity to predators.
3
Pair the identified strategies in order
The respective strategies are Cryptic coloration for the adult insect and Aposematic coloration for the caterpillar.
This accurately distinguishes between blending into environmental surroundings and advertising chemical unpalatability.

Key Concept

Distinction between Cryptic Coloration (Camouflage) and Aposematic Coloration (Warning Coloration)
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Topics

Structural Adaptations for Survival: Coloration, Camouflage, and Mimicry

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