منابع مشابه
: metadiscourse in introduction sections of applied linguistics and physics research articles: exploring variation in frequency and type
abstract in written mode of language, metadiscourse markers are used commonly to help writers in general and academic writers in particular to produce coherent and professional texts. the purpose of the present study was to compare introduction sections of applied linguistics and physics articles regarding their use of interactive and interactional metadiscourse markers based on the model pro...
15 صفحه اولGeographical variation in seed production, predation and abortion in Juniperus communis throughout its range in Europe
1 The geographical variation of seed production, predation and abortion was analysed in Juniperus communis for 31 populations in seven distinct regions throughout the species' distribution range in Europe, including both the northern and southern boundaries. 2 The number of seeds per cone and the number of ®lled seeds per cone varied signi®cantly between geographical regions and among populatio...
متن کاملVARIATION IN JUNIPERUS DURANGENSIS AND RELATED JUNIPERS (CUPRESSACEAE): ANALYSIS OF nrDNA AND petN SNPs
Recent discovery of a low shrub from Topia, in the state of Durango, Mexico that appears similar to both J. durangensis and J. jaliscana, prompted the analyses of nrDNA and petN-psbM (cpDNA) SNPs. The plants from Topia differed from J. durangensis by 2 indels but were shown to be closely related as shown in a minimum spanning network. Phytologia 91(2): 353-358 (August, 2009).
متن کاملVariation, Isolating Mechanisms, and Hybridization in Certain Toads.
On the species problem the interests of genetics, taxonomy, and ecology converge to a remarkable extent, and it seems that only through coordination of the methods of these several disciplines can satisfactory progress in this field be made. Where closely-related species, or populations very nearly attaining the rank of species, are involved, the problem attains a maximum of complexity; it is j...
متن کاملTAXONOMY OF JUNIPERUS COMMUNIS IN NORTH AMERICA: INSIGHT FROM VARIATION IN nrDNA SNPs
Plants of Juniperus communis L. var. communis, J. c. var. depressa Pursh, J. c. var. jackii Rehdr, J. c. var. saxatilis Pall. were sampled and SNPs from nrDNA were examined. Based on these data and previous data, a new variety of J. communis is recognized: Juniperus communis var. charlottensis R. P. Adams, var. nov. It occurs in muskeg bogs on Queen Charlotte Island, British Columbia and in the...
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ژورنال
عنوان ژورنال: Annals of the Missouri Botanical Garden
سال: 1952
ISSN: 0026-6493
DOI: 10.2307/2394490