Several species of leopard frogs are common throughout North America, where their ranges overlap. Different species of leopard frogs are very similar in appearance, but the males of each species have a unique courtship call. How did speciation most likely occur in leopard frogs?

Are substances released into the environment that in excess amounts cause damage

Read the following scenario to answer the following question. in some zoos, rare crosses between a male lion and a female tiger have produced hybrid offspring called "ligers." male ligers are sterile but some female ligers are fertile. in the wild, lion and tiger ranges do not naturally overlap, making such a cross unlikely. furthermore, the solitary behavior of tigers and the social organizations of lions create behavioral differences. applying the biological species concept, the sterility of ligers reveals that a. lions are probably a subspecies of tigers b. tigers and lions are the same species c. a new species called "ligers" is forming d. tigers and lions are separate species

What the theory that the sun goes around earth was replaced with the theory that earth goes around the sun this was an exaple of a