However, changes in land use (e.g., afforestation of arable to urban) and/or vegetation cover (e.g., deforestation or afforestation of arable land) are sources of catchment variation that might generate high amounts of variability or noise, making it difficult to tease apart components of natural variation from the effects of anthropogenic impact on surface water chemistry.
Epigenetic changes can occur at a high frequency in crop plants and might generate phenotypic variation that is not correlated with genetic variation [ 10].
Several mechanisms might generate this pattern, including variation in herbivory, but there is no evidence of differences in herbivory in inbred and outbred plants at any planting site (J. Hereford, unpubl. res).
On the other hand, further selective episodes cannot be discarded, as there might be smaller adaptive peaks within the main dietary groups and the temporal and spatial variation in resource availability (particularly fruits and flowers) might generate randomly fluctuating selection that is hardly discernible from a Brownian motion [ 25, 34].
These observations might support experimental results suggesting a functional role for polymorphisms in UGT1A1, UGT2B15, and SULT1A1, or might generate new hypotheses about the potential effect of sequence variations in UGT2B4 and UGT2B7, for which there is relatively little biochemical evidence suggesting a functional effect in vitro.
Sw/Jilin/19/07 had two variations at the antigenic sites A and B, while Sw/Jilin/5/07 and Sw/Jilin/37/08 accumulated four variations at the antigenic sites A and B. The gradual mutations of HA might generate new antigenic strains.
We previously hypothesized that stiffer tissues might generate higher forces in order to explain the robustness of gastrulation to substantial natural variation in tissue stiffness [43].
Honesty might generate trust.
These might generate 20percentt of the building's electricity.
Femtocells might generate significant interference to the MUEs.
