This can lead to strong asymmetry in the evolution of partners.
Close associations involving multiple adaptations and co-evolution between partners can result in permanent and obligate relationships, whereby the bacterial symbiont is stably integrated into the host system, and vertically transmitted across generations.
The presence of a similar pattern among first generation hybrid females supports a potential role of the hybridization process in the evolution of partner preference in the common vole.
Not requiring the evolution of partner recognition (Travisano and Velicer, 2004; Foster and Wenseleers, 2006), spatial self-organization offers a simple and fundamental mechanism solely driven by acts of strong cooperation and cheating during cell growth into open space.
The analysis of the frequency data showed a similarly significant evolution for physical partner violence and psychological partner abuse, but not for sexual violence.
The two had been aligned since 2002, as members of Evolution, and were partners in a tag team match on the show.
This interdependence may be a consequence of reductive evolution in both partners, as several biosynthetic pathways (e.g. synthesis of heme, riboflavin, nucleotides, etc).
Symbiotic associations between bacteria and animal hosts shape the ecology and evolution of both partners (Dubilier et al. 2008; Moran et al. 2008; Moya et al. 2008).
TEs and genomes have probably been in constant contact since life began, and this cohabitation has had repercussions on the evolution of both partners.
Since the beginning, genomes regularly feed on TEs," and "TE and genome have been in constant contact since probably the beginning of life and such promiscuity has had repercussions on the evolution on both partners".
The impressive array and diversity of species harboring one or more type(s) of endosymbionts raises the possibility that such associations may play a predominant role in the ecology and evolution of both partners.
