Question

Which of these is least likely to be an adaptation of an organism to its environment?
a.Porcupines have evolved sharp quills that deter predators.
b.Mosquitoes have evolved chemicals that prevent blood clotting, allowing them to extract blood from other animals.
c.Cave fish have evolved degenerated eyes because they have no use for vision in dark, underwater caves.
d.Bats have evolved echolocation for navigating dark spaces.
e.Birds have evolved hollow bones that lighten their load on muscles during flight.

Answer 1

Answer:

The correct answer is "C. Cave fish have evolved degenerated eyes because they have no use for vision in dark, underwater caves."

Explanation:

All of these statements about organism adaptation to its environment are true, but the real reason why cave-fish are blind is not because there's no use for their eyes in the dark, but because being blind saves them energy, as using one's vision requires the activity of photoreceptive cells and neurons, and underground caves are lacking in both food and oxygen.