Practice Quiz

HESI A2 Practice Test

Category - Biology

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Which of the following pairs is not an example of analogous structures?
  1. Wings of a butterfly and wings of a bat
  2. Eyes of a human and the eyes of a mollusk
  3. Legs of a cat and the legs of a dog
  4. Arm of a chimpanzee and the flipper of a dolphin
  5. Claw of a bear and the claw of a wolf
Explanation
Answer: D, The pair that is not analogous is the arm of a chimpanzee and the flipper of a dolphin. Those are actually homologous structures.

Key Takeaway: Analogy occurs when two structures evolve independently in different species to perform the same function. This does not refer to similar structures in closely related species, but in species that are vastly different. These structures evolved over time as a result of convergent evolution, the process by which different species become more similar.
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