Mosaic EvolutionEdit

the concept that major evolutionary changes tend to take place in stages, not all at once.

Source: Relethford, J.H. (1997). The human species: An introduction to biological anthropology. Mayfield Publishing Company: Mountain View, CA.

the retention of ancestral characteristics in combination with new ones.

Source: Cummings, M.R. (1996). Biology: Science and life. West Publishing Company: St. Paul, MN 


Archeopteryx- an early bird-like fossil with characteristics of dinosaurs like teeth, tail, hind legs, and brain, and bird like features like feathers and a wishbone.

Primatelike mammals have shown primate features like the teeth (molar teeth), base of the skull, structure of the ankle, and climbing ability.

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