Problems Of Life On Land

Shoulder Girdle Fish

The first tetrapods faced major problems in moving from the water on to the land. Air breathing was in fact not the key hurdle to cross, but rather weight and structural support. New modes of locomotion had to evolve, as well as new ways of feeding, of sensing prey and predators, of water balance and of reproduction. When all these problems of life on land are considered may seem surprising that vertebrates ever left the protection of the water. One classic theory e.g. Romer 1966 was that...