Mosaic evolution

Mosaic evolution (or modular evolution) is the concept, mainly from palaeontology, that evolutionary change takes place in some body parts or systems without simultaneous changes in other parts. Another definition is the "evolution of characters at various rates both within and between species".⁴⁰⁸ Its place in evolutionary theory comes under long-term trends or macroevolution.

Evolutionary biology
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Darwin's finches by John Gould
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