Buettner-Janusch has defined adaptive radiation as the rapid increase in numbers, and kinds of any evolving group of organisms into several distinctive econiches to which each group is particularly adapted. Thus, adaptive radiation is the spread of a species by way of evolving into progressively distinct types of organisms. From a single ancestral form different new forms may be evolved to adapt to the rapidly changing environmental conditions. Reptiles are cold-blooded animals, while the mammals are warm-blooded. During the Paleocene period when the climate grew colder the dinosaurs could not adapt and therefore become extinct. But the mammals evolved into … Continue reading What is Adaptive Radiation?