[Campbell Biology P.528] The text describes 'vestigial structures' as remnants of features t... | Practice Question

The text describes 'vestigial structures' as remnants of features that served a function in an organism's ancestors but are of marginal or no importance to the current organism. Which of the following examples is NOT explicitly mentioned in the text as a vestigial structure?

  • A: Pelvis and leg bones in snakes
  • B: Eye remnants in blind species of cave fishes
  • C: Human appendix
  • D: Shared genes between humans and bacteria

Explanation

The text specifically mentions the pelvis and leg bones in snakes and eye remnants in blind cave fishes as examples of vestigial structures. While the human appendix is a common example of a vestigial structure, it is not explicitly stated in this particular text.