Results 81 to 90 of about 310,165 (420)

Functional Divergence of Plant‐Derived Thaumatin‐Like Protein Genes in Two Closely Related Whitefly Species

open access: yesAdvanced Science, EarlyView.
Two closely related whitefly species, Trialeurodes vaporariorum and Bemisia tabaci, are found to each possess a plant‐derived TLP gene, but with entirely different functions. This finding of functional divergence challenges the notion that HGT genes maintain similar functions across species and shows that they can follow unique evolutionary paths that ...
Yuan Hu   +12 more
wiley   +1 more source

ANALISE ISOTÓPICA DE OXIGÊNIO E CARBONO EM MICROFÓSSEIS DA FORMAÇÃO ROMUALDO, CRETACEO INFERIOR, BACIA DO ARARIPE, PERNAMBUCO, NORDESTE DO BRASIL

open access: yesGeochimica Brasiliensis, 2019
This work presents the analysis of C and O isotope values behavior in the carapace of ostracodes and foraminifera from the Romualdo Formation, Araripe Basin – PE.
Rilda Cardoso Araripe   +5 more
doaj   +1 more source

Geological heritage of the Northwestern Caucasus and its importance for promoting a better understanding of the Earth's structure and evolution

open access: yesУчёные записки Казанского университета: Серия Естественные науки, 2022
In this article, 13 sites of geological heritage were identified in the Seversk district of the Krasnodar region (Russia), which rests on the northern slope of the Northwestern Caucasus.
Z.A. Tolokonnikova
doaj   +1 more source

Upper Cretaceous Mollusca from Southern California [PDF]

open access: yes, 1937
One new genus and thirteen new species of Mollusca are described from the Upper Cretaceous fauna of the Santa Ana Mountains, southern California. New generic assignments based upon discovery and study of previously unobserved structural features are ...
Popenoe, Willis Parkison
core  

A reappraisal of the Italian record of the Cretaceous pachycormid fish Protosphyraena Leidy, 1857 [PDF]

open access: yes, 2017
The genus Protosphyraena is known mainly from partial remains, consisting of isolated blade-like teeth, conical rostra and scythe-like pectoral fins. This paper provides a new insight into partial specimens of the genus Protosphyraena from the Cretaceous
Amalfitano, Jacopo   +3 more
core   +3 more sources

State shift in Deccan volcanism at the Cretaceous-Paleogene boundary, possibly induced by impact

open access: yesScience, 2015
Making an impact in more ways than one Massive eruptions formed the Deccan Traps flood basalts in India at around the same time as the mass extinction event 65 million years ago. Renne et al.
P. Renne   +5 more
semanticscholar   +1 more source

The PteridoPortal: A publicly accessible collection of over three million records of extant and extinct pteridophytes

open access: yesApplications in Plant Sciences, EarlyView.
Abstract Premise Pteridophytes—vascular land plants that disperse by spores—are a powerful system for studying plant evolution, particularly with respect to the impact of abiotic factors on evolutionary trajectories through deep time. However, our ability to use pteridophytes to investigate such questions—or to capitalize on the ecological and ...
Carl J. Rothfels   +67 more
wiley   +1 more source

Endogenous Versus Exogenous Shocks in Complex Networks: an Empirical Test Using Book Sale Ranking [PDF]

open access: yesPhys. Rev. Letts. 93 (22), 228701 (2004), 2003
Are large biological extinctions such as the Cretaceous/Tertiary KT boundary due to a meteorite, extreme volcanic activity or self-organized critical extinction cascades? Are commercial successes due to a progressive reputation cascade or the result of a well orchestrated advertisement?
arxiv   +1 more source

IV.—Cretaceous Gasteropoda [PDF]

open access: yesGeological Magazine, 1876
In September, 1875, Decade II. Vol. II. p. 394, of this Magazine, I was enabled, after having previously described them in detail, to group all the known British Cretaccous Aporrhaidæ together into four genera; and in March, 1876, I added a fifth genus.
openaire   +2 more sources

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