منابع مشابه
Why Sex? and Why only in Pairs?∗
No single question has been more central to our understanding of sex than the question of why a species reproduces sexually when asexual reproduction avoids the twofold cost of males. Surprisingly, an equally fundamental question has received virtually no attention at all. That is, why are there no triparental species in which an offspring is composed of the genetic material of three individual...
متن کاملWhy Sex? and Why Only in Pairs?1
Understanding the purpose of sex remains one of the most important unresolved problems in evolutionary biology. The di¢ culty is not that there are too few theories of sex, the di¢ culty is that there are too many and none stand out. To distinguish between theories we suggest the following question: Why are there no triparental species in which an o¤spring is composed of the genetic material of...
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Introduction: Nursing education should develop autonomy, critical thinking, open-mindedness and sensitivity to others. Reflection seems to be an effective strategy for developing such capabilities in nursing. Therefore, this narrative review study was carried out to explore reflection in nursing education. Methods: Using keywords like reflecting, reflection and nursing reflection, FarsiandEngl...
متن کاملWhy sex and recombination?
Sex and recombination have long been seen as adaptations that facilitate natural selection by generating favorable variations. If recombination is to aid selection, there must be negative linkage disequilibria-favorable alleles must be found together less often than expected by chance. These negative linkage disequilibria can be generated directly by selection, but this must involve negative ep...
متن کاملWhy no casopitant-only arm?
1. Edlow BL, Wainger BJ, Frosch MP, Copen WA, Rathmell JP, Rost NS: Posterior circulation stroke after C1-C2 intraarticular facet steroid injection: Evidence for diffuse microvascular injury. ANESTHESIOLOGY 2010; 112:1532–5 2. Madawi AA, Casey AT, Solanki GA, et al: Radiological and anatomical evaluation of the atlantoaxial transarticular screw fixation technique: Case report and review of the ...
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ژورنال
عنوان ژورنال: The Economic Journal
سال: 2017
ISSN: 0013-0133,1468-0297
DOI: 10.1111/ecoj.12364