The study sheds light on the mechanisms and adaptive significance of gene family evolution. (sciencedaily.com)
It is argued that sex differences in attachment emerge in middle childhood, have adaptive significance in both children and adults, and are part of sex - specific life history strategies. (cambridge.org)
The temporal variation hypothesis suggests that song may simply drift or change over time within a population with no particular adaptive significance and, therefore, different populations with limited gene flow might evolve different song dialects simply by drifting apart [11]. (rsos.royalsocietypublishing.org)