[PDF] Top 20 The origin and evolution of mammals

... in the fossil record, therapsids had already diversified into several distinct groups, although the considerable number of characters they share indicates that the Therapsida is a monophyletic ... Voir le document complet

... revisited the evolution of PVs using phylogenetic dating on the largest and most diverse dataset compiled to ...date. The evolutionary scenario with the best explanatory ... Voir le document complet

... was the ear- liest paroxyclaenid known at that time). The newly described fossils from the Paris Basin show that the old- est paroxyclaenids have a wide stylar shelf that is sym- metrical in ... Voir le document complet

... how the transport of the res- piratory gas influences the control of ventilation, and more generally, the behavior of the lung and respiratory ... Voir le document complet

... as the starting isotopic composition for the atmosphere, solving the xenon paradox calls for complex models with episodes of mantle degassing and early isotopic fractionation of ... Voir le document complet

... along the anterior/posterior axis, this ancestor used gene networks homologous to those patterning three organizing centers in the vertebrate brain: the anterior neural ridge, the zona ... Voir le document complet

... for the deposit and dissemination of sci- entific research documents, whether they are pub- lished or ...not. The documents may come from teaching and research institutions in France or ... Voir le document complet

... Remarks and Future Perspectives The results derived from this study should prompt a critical re-evaluation of fos- sil elasmobranch ...Although the monophyly of Neoselachii is supported ... Voir le document complet

... remnant and smaller fragments. 2.3. Heating analysis The shock physics code calculations of the collisions were performed in Jutzi et ...using the relatively simple Tillotson equation ... Voir le document complet

... The stresses, which occur under sideward directed exter- nal forces in the plane of the tooth row, are sustained by the most lateral parts of the strucmre, mainl[r] ... Voir le document complet

... Although the overall sample size is still limited, it ap- pears that the metallicity gradients vary systematically with redshift and here we seek to quantify this ...determine the approximate ... Voir le document complet

... Abstract The massive O4.5 V + O5.5 V binary VFTS 352 in the Tarantula Nebula is one of the shortest-period and most massive overcontact binaries ...some of these systems could ... Voir le document complet

... distribution of aaRS follows a clear pattern of diversity in family Mimiviridae: viral genomes with a wealthy aaRS gene set ...types of aaRS found in the rest of the family [ 6 , ... Voir le document complet

... ter the surface, we look at a deeper shell in the star, i.e. at 60% of stellar ...In the first three models, (b), (e) and (h), we are looking in the convective envelop, since ... Voir le document complet

... Introduction The search for prebiotic organic compounds of non-terrestrialorigin such as amino acids, is one of the major tasks of numerous space missions [1,2] and meteorite ... Voir le document complet

... Since the late 1970s, remote sensing has furnished images enabling us to acquire data on land use (Cihlar et ...up the possibility of including in numerous models the role of vegetation ... Voir le document complet

... Selection of claudin-low tumors. Claudin-low tumors exhibit marked immune and stromal cell infiltration, when compared with all other breast cancer subtypes 4 , 19 ...used the allele-specific copy ... Voir le document complet

... Implications The main aim of this study was to evaluate if carbon isotope ratios can potentially be used to identify the origin and fate of VC at sites with multiple ...Regarding ... Voir le document complet

... The study of many hours of conversation has led us to another definition of relevance (Dessalles 1985, 1993), or more accurately to three definitions of ...discussion of ... Voir le document complet

... Mots-Clés: Province des Montérégiennes (Québec), Rb-Sr, Sm-Nd, Lu-Hf, Pb commun, gaz rares (He-Ar), azote, manteau lithosphérique, Tépho-chronostatigraphie, Formation de P[r] ... Voir le document complet