Mostrando 5,241 - 5,260 Resultados de 5,793 Para Buscar '"Taxón"', tiempo de consulta: 0.47s Limitar resultados
  1. 5241
    por Ray, Lindsey, Medeiros, Daniel
    Publicado 2023
    “…A conspicuous head housing a large brain, paired sense organs, and protected by a skeleton of cartilage and bone is unique to vertebrates and is a defining feature of this taxon. Gans and Northcutt (1980s) proposed that the evolution of this “new head” was dependent on two key developmental innovations: neural crest cells (NCCs) and ectodermal placodes. …”
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  2. 5242
    “…DISCUSSION: Overall, our work emphasizes the utility of applying biomedical tools, like PhIP-Seq, first developed for humans to viral surveillance efforts in wildlife, while highlighting opportunities for taxon-specific improvements.…”
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  3. 5243
    “…BACKGROUND: Phasmatodea (stick and leaf insects) play a central role on the debate regarding wing reduction and loss, and its wings are putative reacquisition from secondarily wingless ancestors based solely on extant species. A pivotal taxon in this respect is the species-poor Timematodea, consisting of approximately 21 wingless extant species, which form the sister group of all remaining winged or wingless stick and leaf insects, the Euphasmatodea. …”
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  4. 5244
    “…An excellent system to address the questions of how extensive and structured chromosomal changes within one species complex affect the phenotype is the monocot species complex of Barnardia japonica. This taxon contains two well established and distinct diploid cytotypes differing in base chromosome numbers (AA: x = 8, BB: x = 9) and their allopolyploid derivatives on several ploidy levels (from 3x to 6x). …”
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  5. 5245
    “…The Landscape Reconstruction Algorithm (LRA) is regarded as the soundest approach for quantifying taxon-specific plant cover from pollen data. The reliability of relative pollen productivity (RPP) estimates is fundamental in the accuracy of quantitative vegetation reconstruction using the LRA approach. …”
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  6. 5246
    por de Hoog, Sybren, Walsh, Thomas J., Ahmed, Sarah A., Alastruey-Izquierdo, Ana, Alexander, Barbara D., Arendrup, Maiken Cavling, Babady, Esther, Bai, Feng-Yan, Balada-Llasat, Joan-Miquel, Borman, Andrew, Chowdhary, Anuradha, Clark, Andrew, Colgrove, Robert C., Cornely, Oliver A., Dingle, Tanis C., Dufresne, Philippe J., Fuller, Jeff, Gangneux, Jean-Pierre, Gibas, Connie, Glasgow, Heather, Gräser, Yvonne, Guillot, Jacques, Groll, Andreas H., Haase, Gerhard, Hanson, Kimberly, Harrington, Amanda, Hawksworth, David L., Hayden, Randall T., Hoenigl, Martin, Hubka, Vit, Johnson, Kristie, Kus, Julianne V., Li, Ruoyu, Meis, Jacques F., Lackner, Michaela, Lanternier, Fanny, Leal Jr., Sixto M., Lee, Francesca, Lockhart, Shawn R., Luethy, Paul, Martin, Isabella, Kwon-Chung, Kyung J., Meyer, Wieland, Nguyen, M. Hong, Ostrosky-Zeichner, Luis, Palavecino, Elizabeth, Pancholi, Preeti, Pappas, Peter G., Procop, Gary W., Redhead, Scott A., Rhoads, Daniel D., Riedel, Stefan, Stevens, Bryan, Sullivan, Kaede Ota, Vergidis, Paschalis, Roilides, Emmanuel, Seyedmousavi, Amir, Tao, Lili, Vicente, Vania A., Vitale, Roxana G., Wang, Qi-Ming, Wengenack, Nancy L., Westblade, Lars, Wiederhold, Nathan, White, Lewis, Wojewoda, Christina M., Zhang, Sean X.
    Publicado 2023
    “…Given the instability of phylogenetic trees due to variable taxon sampling, we advocate to maintain genera at the largest possible size. …”
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  7. 5247
  8. 5248
    “…We characterize communities across distinct sites and plant species and uncover extensive genomic diversity at the taxon level and specific genomic features present in MAGs affiliated with uncultivated sulfur-cycling lineages. …”
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  9. 5249
    “…Furthermore, there is strong support for the placement of the Myrtales sister to the eurosid I clade, although expanded taxon sampling is needed to further test this relationship.…”
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  10. 5250
    “…For echiurans, the polychaete group Capitellidae is corroborated as the sister taxon; while the exact placement of Sipuncula within Annelida is still uncertain, our analyses suggest an affiliation with terebellimorphs. …”
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  11. 5251
    “…In particular, while the taxon joining hexapods and crustaceans (the Pancrustacea) is now widely accepted among zoologists, the relationships among its basal lineages, and particularly the supposed reciprocal paraphyly of Crustacea and Hexapoda, continues to represent a challenge. …”
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  12. 5252
    “…However, phylogenetic relationships within the two groups and among fabids, malvids, and potentially basal rosids including Geraniales, Myrtales, and Crossosomatales remain to be resolved with more data and a broader taxon sampling. In this study, we obtained DNA sequences of the mitochondrial matR gene from 174 species representing 72 families of putative rosids and examined phylogenetic relationships and phylogenetic utility of matR in rosids. …”
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  13. 5253
    “…Sponges, a highly diverse, ecologically and economically important reef-invertebrate taxon, exhibit spatial trends in the Indo-West Pacific that are not universally reflected in other marine phyla. …”
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  14. 5254
    “…When the source trees host a significant number of topological conflicts or have a small taxon overlap, supertree methods of both kinds can propose poorly resolved, hence uninformative, supertrees. …”
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  15. 5255
    “…CONCLUSION: The combined analyses suggest a scenario in which the most recent common ancestor of L. boeticus and its sister taxon lived in the African region approximately 7 Mya; extant lineages of L. boeticus began spreading throughout the Old World at least 1.5 Mya. …”
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  16. 5256
    “…We found that the number of states at a given site is, on average, smaller and the frequencies of these states are less uniform than expected based on a JTT + F + Γ substitution model. With a four-taxon example, we show that phylogenetic estimation under the JTT + F + Γ model is seriously biased by a long-branch attraction artefact if the data are simulated under a model utilizing the observed site-specific amino acid frequencies from an alignment. …”
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  17. 5257
    “…In conclusion, the soybean Lx gene family expanded by ancient polyploidy prior to taxon divergence, followed by a soybean- specific duplication and tandem duplications, respectively.…”
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  18. 5258
    “…In this study, we obtained DNA sequences from a nearly complete taxon sampling of known species from Europe, Central America and North America. …”
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  19. 5259
    “…Our principal intent is to identify its current geographical distribution and to formulate a phylogeographical hypothesis for this taxon. In addition, we test for orientation patterns in haplotype sharing for evidence of past episodes of movement and gene flow. …”
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  20. 5260
    “…Though evolutionary escape from parasitoids might most effectively be achieved via changes in host oak taxon, extreme conservatism in this trait for gallwasps suggests that selection is more likely to have acted on gall morphology and location. …”
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