Question

Certain fishes, such as lungfishes, further adapted themselves to the terrestrial mode of life and evolved into today's amphibians. Which evolutionary mechanism is represented by this example?

Answer 1

your retarded -.-

Answer 2

A very Lamarkian viewpoint and also quite incorrect. On a pedantic point, lungfishes did not "adapt themselves". Populations of Lung fish ancestors experienced a selective pressure that altered the fitness of some to successfully breed. Those that became parents then passed on characteristics that the lungfish inherited. A likely mechanism for evolution of amphibian habit is that eggs laid near the littoral zone (AKA the shoreline) in would be relatively more likely to avoid being eaten by other animals, thereby increasing the likelihood that the genes for the behavior to lay eggs upshore prosper.