Macro & Micro Evolution
Macroevolution is evolution on a scale of separated gene pools. Macroevolutionary studies focus on change that occurs at or above the level of species, in contrast with microevolution which refers to smaller evolutionary changes (typically described as changes in allele frequencies within a species or population. Contrary to claims by creationists, macro and microevolution describe fundamentally identical processes on different time scales.Restreived from http://en.wikipedia.org/wiki/Macroevolution on November 28, 2013.
Example of Macroevolution (whales)Edit
Whales are one of the most well known examples of macroevolution. Extensive fossil evidence over the last few decades on the Indian subcontinent and North Africa has revealed links to explain the transition from the mammals life on land to the sea. Transitional species from the Eocene epoch Archaeocetes (Dorudon), Basilosaurus, Ambulocetus, Mesonychids (Pachyaena), Pakicetus, and Rodhocetus show the gradual change from a terrestrial four-legged species to a water living mammal over a 20 million year time period.
Bajpai, S., Thewissen, J. G. M., & Sahni, A. (2009). The origin and early evolution of whales: macroevolution documented on the Indian Subcontinent. Journal of Biosciences, 34(5), 673-686.
Gingerich, P.D. (2012). Evolution of Whales from Land to Sea. American Philosophical Society, 156(3), 309-323.