Results 21 to 30 of about 21,547 (296)

A modified trap design for sampling subterranean habitats for central Texas Eurycea salamanders [PDF]

open access: yesSubterranean Biology
In this paper, we describe modifications to a sampling technique for surface, stream-dwelling salamanders for use in subterranean settings. Leaf litter bags are an effective and commonly used trap for salamanders, and their construction purposefully ...
Ryan M. Jones   +3 more
doaj   +3 more sources

The Cambrian explosion [PDF]

open access: yesCurrent Biology, 2015
The sudden appearance of fossils that marks the so-called 'Cambrian explosion' has intrigued and exercised biologists since Darwin's time. In On the Origin of Species, Darwin made it clear that he believed that ancestral forms 'lived long before' their first fossil representatives.
openaire   +3 more sources

Cambrian fans

open access: yesJournal of the European Mathematical Society, 2009
For a finite Coxeter group W and a Coxeter element c of W, the c -Cambrian fan is a coarsening of the fan defined by the ...
Nathan Reading, David E. Speyer
openaire   +3 more sources

Accessing Heart Health: A Northern Experience

open access: yesOnline Journal of Rural Nursing and Health Care, 2011
Background and Research Purpose: Coronary heart disease (CHD) continues to be a major cause of death and disability across the globe. Regional differences in CHD exist throughout Canada, including Ontario. It is important to explore the complex interplay
Katherine Timmermans   +6 more
doaj   +1 more source

Research on Reservoir Characteristics and Main Controlling Factors of Longwangmiao Formation of Cambrian in Sichuan Basin

open access: yesFrontiers in Earth Science, 2022
Based on the 4 measured profiles, 17 observation profiles, and 13 drilling core macroscopic and microscopic characteristics of the Cambrian Longwangmiao Formation in the Sichuan Basin, combined with analysis and testing, and reservoir logging ...
Qiang Wang   +3 more
doaj   +1 more source

The Cambrian Explosion [PDF]

open access: yesCurrent Biology, 2002
What is it? Many things, but all connected to the emergence of the principal metazoan phyla, that is the assembly of the triploblastic body plans in three superclades — deuterostomes (you and sea-urchins), ecdysozoans (worm, flies and, oh yes, penis worms), and lophotrochozoans (annelids, brachiopods, molluscs).
openaire   +2 more sources

Sedimentary characteristics and development model of Cambrian gypsum-salt rocks, Tarim Basin

open access: yesShiyou shiyan dizhi, 2021
The Cambrian gypsum-salt rocks in the Tarim Basin are key geological elements to the pre-salt play typical marine evaporites, yet little attention has been paid to this set of evaporites.
Qi FAN   +5 more
doaj   +1 more source

Cambrian Trilobites [PDF]

open access: yesProceedings of the National Academy of Sciences, 1916
USNM ...
openaire   +2 more sources

Cambrian Chordates and Vetulicolians [PDF]

open access: yesGeosciences, 2019
Deuterostomes make a sudden appearance in the fossil record during the Early Cambrian. Two deuterostome groups, the chordates and the vetulicolians, are of particular interest for understanding the evolutionary dynamics of the Cambrian evolutionary event.
openaire   +4 more sources

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