Biological coevolution is a reciprocal evolutionary process in which two or more species exert selective pressures on each other, leading to genetically correlated changes in their traits over time.

1. Comparative biochemistry and evolution of milk oligosaccharides of monotremes, marsupials, and eutherians / Tadasu Urashima, Michael Messer and Olav T. Oftedal -- 2. Genomics-based insights into ...