Grasses, the dominant plants of savannas, appeared only about 50 million years ago, although it is possible that some savanna-like vegetation lacking grasses occurred earlier.
In summary, recent comprehensive characterization of basal-like breast cancer demonstrates that this subtype of disease has high genetic heterogeneity, but lacks commonly occurring genetic alterations, with the exception of the frequent inactivation of p53 (Cancer Genome Atlas Network, 2012).
Development of the first pair of true leaves in plants of both lines lacking GPT2 occurred 12 15 h later than in wild-type (data not shown), indicating that there were no additional delays in seedling establishment.
An important barrier to adoption of predictive models is that health professionals tend to consider that they lack naturally occurring cut points, he noted.
However, recombination (breaking and joining of homologous RNA segments) is lacking or occurs at an extremely low rate in phage ϕ6 [ 33], allowing its possible effects to be ignored in our study.
Although several influenza A virus strains that lack PB1-F2 occur naturally, PB1-F2 likely contributes to viral pathogenicity and might have an important role in determining the severity of pandemic influenza.
But all of these candidates share something Romney lacks: Their campaigns occurred before the advent of the current primary and caucus system for choosing a nominee.
The letter noted that "early regrowth that does occur lacks the habitat values and carbon content possessed by remnant vegetation".
The initiation phase is generally believed to constitute the nucleation and growth of short cracks, but the threshold crack length at which initiation occurs lacks a uniform definition.
Many countries seek to explicitly formulate priorities and translate these through benefit design and other explicit managerial decisions but much rationing is implicit, lacks transparency, and occurs in the routine provision of care.
