Biology 9th Edition by Eldra Solomon,Linda Berg ,Diana Martin

Exercise 6

EVOLUTION LINK. Although most salamanders have four legs, a few species that live in shallow water lack hind limbs and have extremely tiny forelimbs ( see photograph ). Develop a hypothesis to explain how limbless salamanders came about according to Darwin's mechanism of evolution by natural selection. How could you test your hypothesis
The narrow-striped dwarf siren ( Pseudobranchus striatus axanthus )is an aquatic salamander that resembles an eel. It is native to Florida.