Sentence examples for exert selection from inspiring English sources

Crossbills are now the primary seed predator and exert selection on cone structure favoring the evolution of increased defenses directed at crossbills (i.e., thicker distal scales).

The envelope (Env) protein, expressed on the surface of virus particles, determines target cell specificity; thus, variations in target cell populations are likely to exert selection pressure on the virus.

Fluctuations in abundance of thrushes must have affected their capacity to exert selection on the snails.

Thus, there are two different preference peaks, which may exert selection on male signals.

Mosquitoes, like other organisms, encounter numerous pathogens during their life cycle, all of which could potentially exert selection pressure on the immune system.

It is also of note that an overzealous anti-Rev response may exert selection pressure which could lead to reduced Rev activity.

The possibility of exerting selection criteria at the molecular level shortens the generation interval as the selection decision can take place early in the life of an animal.

In contrast, those crossbills for which we have no evidence of their exerting selection on cone structure match the predicted optima (lodgepole pine [call type 5] and western hemlock [call type 3] crossbills although the hemlock crossbill appears not to preferentially forage on smaller cones, it apparently exerts selection on seed coat structure; Benkman et al. in press).

Those crossbills, for which we have evidence of their either exerting selection on their key conifers, or evolution of increased crossbill defenses in their key conifers, are the crossbills having smaller than "optimal" bills (the Douglas-fir [call type 4], ponderosa pine [call type 2], and South Hills [call type 9] crossbills; Benkman et al. in press).

In the Chinese population one or more prevalent HLA class II allele(s) might present immunodominant EBV antigenic peptides to the immune system, thereby exerting selection pressure to downregulate this molecule.

Temeles et al. (2009) described an intriguing system involving sexually dimorphic purple-throated carib hummingbirds (Eulampis jugularis) exerting selection on the shape of Heliconia (Heliconiaceae) flowers.