منابع مشابه
Why are clicks so exclusive ?
Clicks occur abundantly in the languages of southern Africa, but are not found anywhere else. This is unexpected since the clicks seem to be both auditorily salient and easy to produce. This paper suggests that the reason for the areal skewness of clicks lies in the African phonetictypological environment rather than in production or perception constraints. In particular, clicks are limited to ...
متن کاملWhy Are Pvm and Mpi so Diierent?
PVM and MPI are often compared. These comparisons usually start with the unspoken assumption that PVM and MPI represent diierent solutions to the same problem. In this paper we show that, in fact, the two systems often are solving diierent problems. In cases where the problems do match but the solutions chosen by PVM and MPI are diierent, we explain the reasons for the diierences. Usually such ...
متن کاملWhy are sex and recombination so common?
The abundance of sex and recombination is still one of the most puzzling questions in the theory of evolution: Most models find that recombination can evolve, but only under a limited range of parameters. Here we review the major models and supporting evidence, concentrating on recent approaches where more realistic assumptions help explain the evolution of sex and recombination under a wider p...
متن کاملWhy are so many trees hollow?
In many living trees, much of the interior of the trunk can be rotten or even hollowed out. Previously, this has been suggested to be adaptive, with microbial or animal consumption of interior wood producing a rain of nutrients to the soil beneath the tree that allows recycling of those nutrients into new growth via the trees roots. Here I propose an alternative (non-exclusive) explanation: suc...
متن کاملWhy Are So Many Bird Flowers Red?
Why are so many bird fl owers red? PLoS Biol 2(10): e350. and Luis Santamaría. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Open access, freely available online M ost bird-pollinated fl owers are both red and rich ...
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ژورنال
عنوان ژورنال: Nordic Journal of Religion and Society
سال: 2017
ISSN: 1890-7008,0809-7291
DOI: 10.18261/issn1890-7008-2009-01-04