There is also ancient variation in alpha 2, but the alpha 1 situation is much more pronounced so in the present paper we have therefore chosen to concentrate on alpha 1.
Like any basic ancient recipe, variations abound.
Jones had been working for decades on the collection of data – from instrument measurements, tree rings (which reveal ancient weather variations) and other sources – that have provided clear evidence that global temperatures are higher now than they have been for several thousand years.
In particular, the maize p locus with its well-established genetic history offers a tremendous amount of ancient allelic variations, some representing intermediate steps in large-scale sequence rearrangements.
However, access to a pool of ancient adaptive variation via genetic exchange emerges as an important driver of adaptive radiation.
Since then, there has been an increasing interest in gender archaeology and numerous studies of how gender varied over time as seen in studies of social relations in a wide range of ancient societies, variation in making and using tools, technological innovations, settlements, and ways of living.
First, even if there were such a practice would Medieval and Renaissance artists be familiar with an obscure ancient Jewish variation?
Although multiple substitutions were previously thought to occur only for ancient divergences, variation in evolutionary rates across sites due to different functional constraints can produce multiple hits even for recent divergences [ 25- 27].
Hints that warming is being caused by emissions from industry and other human activities have been extracted from air bubbles trapped in ancient ice, from variations in tree rings, from the quick retreat of alpine glaciers.
One of several, it turned out, for — as Raymond Erickson pointed out in his program notes — the passacaglia, an ancient form featuring variations on a ground bass or a harmonic progression, and its close kin the chaconne, formed a sort of subtheme for the concert.
