Cultural historians will eventually sort out the origins of step, but the rough consensus is that it originated in Africa, where it may have served as a means for people without a common language to get to know one another.
The origin of this step-like shift can be explained by our structure model.
The best biogeographical scenario supports America as the most likely area of origin of Pandion (step 1 Fig. 7).
The natural history of ovarian tumors, including their cell type of origin and steps of carcinogenesis, is poorly understood and has been the subject of much debate and discussion.
Although broadly consistent with the differential weathering invoked by Wahrhaftig, the data also show that steps are eroding faster than treads, undermining Wahrhaftig's explanation for the origins of the steps.
This article proposes a very specific hypothesis on the origin of the first steps in the evolution of the genetic code.
Eugene V. Koonin, National Center for Biotechnology Information, National Library of Medicine, NIH, Bethesda, USA This manuscript addresses arguably the most fundamental and most difficult problem in the study of the origin of cells: the steps leading to the emergence of the translation system.
Fig. 6 Based on the results of Rayleigh (1919, see Annex) the cumulative probability was calculated that in a 3-dimensional space a sequence of N = 2 and N = 3 random steps with equal length R and arbitrary orientation end in a distance r from the origin of the first step.
The origin of the last two steps, hydroxylation (BX6) and methylation (BX7) is less clear, because sequences orthologous to the maize genes are not currently available.
The first installment looks at Denzel's most recent outing, The Equalizer, where he plays a retired lethal spy of uncertain origin who steps form the shadows to help a hooker with a heart of gold.
