منابع مشابه
Status of Waterplantain Buttercup in British Columbia
xii British Columbia, Canada's most westerly province, has a bounty of biological diversity. British Columbia's snowclad peaks, rain-drenched forests, arid grasslands, all sizes of rivers, lakes, and wetlands, and a long and rugged coast provide habitats for more species of living organisms than are found anywhere else in Canada. However, this very diversity means that there is much to be disco...
متن کاملNitrogen Uptake during Snowmelt by the Snow Buttercup, Ranunculus adoneus
Your use of the JSTOR archive indicates your acceptance of JSTOR's Terms and Conditions of Use, available at http://www.jstor.org/page/info/about/policies/terms.jsp. JSTOR's Terms and Conditions of Use provides, in part, that unless you have obtained prior permission, you may not download an entire issue of a journal or multiple copies of articles, and you may use content in the JSTOR archive o...
متن کاملRanunculin; the precursor of the vesicant substance of the buttercup.
Association of Official Agricultural Chemists (1945). Official and Tentative Method8 of Analy8i8, 6th ed. Washington, D.C. Barker, S. B. & Summerson, W. H. (1941). J. biol. Chem. 138, 535. Dougherty, R. W. (1941). J. Amer. vet. med. A88. 99, 110. Elsden, S. R. (1945-6). J. exp. Biol. 22, 51. Elsden, S. R. & Phillipson, A. T. (1948). Ann. Rev. Biochem. 17, 705. Friedemann, T. E. (1938). J. biol....
متن کاملFossil embryos deep in the fossil record
Embryos have been found in ‘old’ rocks on four continents, especially in Siberia, Nevada, Australia and China. They have been discovered in sedimentary rocks of even Late Neoproterozoic age, assuming the evolutionary geological column1 (figure 1). The Neoproterozoic is the period, so called, between 1 billion and 550 million years ago. This discovery was in the Doushantuo Formation, Guizhou Pro...
متن کاملA fossil snake with limbs.
A 95-million-year-old fossil snake from the Middle East documents the most extreme hindlimb development of any known member of that group, as it preserves the tibia, fibula, tarsals, metatarsals, and phalanges. It is more complete than Pachyrhachis, a second fossil snake with hindlimbs that was recently portrayed to be basal to all other snakes. Phylogenetic analysis of the relationships of the...
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ژورنال
عنوان ژورنال: Nature
سال: 1922
ISSN: 0028-0836,1476-4687
DOI: 10.1038/109042b0