Bailit howard l (2 risultati)

Pamphlet. Condizione: Very Good. Vol 68, pp. 665-672, Extracted from orig vol, thus begins with title page, stapled & trimmed pamphlet, else VG.

Soft cover. Condizione: Very Good. No Jacket. 1st Edition. 665-672 pages with figures and cited references. Royal octavo (9 1/4" x 6 1/4") bound in original publisher's wrappers. Volume 68, number 3 complete issue. First edition. C. L. Brace proposes that the reduction in the size of the anterior teeth in hominid phytogeny resulted from the accumulation of random mutations when these teeth became selectively neutral as a result of increased tool use. In contrast, we contend that the incisors have adaptive significance; they reflect the selection pressures on the whole functional matrix in which they exist. Moreover, the accumulation of mutations is not biologically possible without affecting the fitness of the whole organism. Lastly, there is no apparent relationship between the size of the anterior teeth and the level of technology in contemporary populations, as the Brace model would predict. Condition: Edge wear, light soiling, spine sunned else very good. .…