Conserved but flexible modularity in the zebrafish skull: implications for craniofacial evolvability.

Abstract excerpt

Morphological variation is the outward manifestation of development and provides fodder for adaptive evolution. Because of this contingency, evolution is often thought to be biased by developmental processes and functional interactions among structures, which are statistically detectable through forms of covariance among traits. This can take the form of substructures of integrated traits, termed modules, which...

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