Evolution. 'Toadness' a key feature for global spread of these amphibians.
Elizabeth
E
Pennisi
D000220:Adaptation, Biological; D000818:Animals; D005075:Biological Evolution; D002025:Bufonidae / Q000033:anatomy & histology / Q000145:classification / Q000502:physiology; D049810:Genetic Speciation; D011157:Population Dynamics; D013020:South America