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KINGDOM Animalia - PHYLUM Chordata - CLASS Osteichthyes - ORDER Gasterosteiformes - FAMILY Gasterosteidae Those in most marine populations also have prominent bony plates along their sides, but these plates are fewer or even lacking in freshwater populations.
Genes called noncoding genes tell other genes when to switch on and off. New research on this type of gene might explain rapid adaptations like lactose intolerance in humans, the spikes on a fish stickleback and varying colors of flies.
