Large changes in the environment for dogs during domestication might have driven positive selection in these genes, some of which might reflect relaxed selective constraints on these proteins where loss of the activities of these genes is often adaptive (for example, less is more26).
Reduced bacterial and archaeal diversity might reflect the selective regime imposed by the contamination of this site.
Alternatively, the reduced PI response to group-I mGlu receptor agonists in the hippocampus of PRS male rats might reflect a selective hypofunction of a restricted population of mGlu5 receptors that are present in neuroprogenitor cells and that support cell proliferation and survival [30].
The base composition in GC rich genomes might reflect stronger selective forces than AT rich genomes [ 17- 19].
The extensive overlap of the distribution of globin variants and the historical record for malaria prevalence suggests hemoglobinopathies might reflect a selective influence.
The phenomenon might reflect the selective pressure of the gastric enzyme on rumen bacteria, since BGL-resistant bacteria will be more likely to colonize the lower gut and the rumen of young animals, than BGL-sensitive strains.
The fact that only higher degree BDIMs are compatible with the observed characteristics of genome evolution suggests that the growth of gene families is self-accelerating, which might reflect differential selective pressure acting on different genes.
