Results 311 to 320 of about 560,038 (351)
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2011
Publisher Summary This chapter discusses the study of living of phylogenetically ancient organisms such as insects, fish, amphibians, reptiles, and primitive mammals that give clues to the function of sleep. This phylogenetic approach toward investigating the origins of sleep has not been without controversy, and there is disagreement in the ...
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Publisher Summary This chapter discusses the study of living of phylogenetically ancient organisms such as insects, fish, amphibians, reptiles, and primitive mammals that give clues to the function of sleep. This phylogenetic approach toward investigating the origins of sleep has not been without controversy, and there is disagreement in the ...
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Journal of the History of Biology, 2020
The concept that renders morphology a tool for phylogeny reconstruction is homology. The concept of homology is rooted in pre-evolutionary idealistic morphology. The claim that the goal of idealistic morphology was the seriability of form may sound paradoxical given that this discipline proceeded within a framework of strictly delimited types.
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The concept that renders morphology a tool for phylogeny reconstruction is homology. The concept of homology is rooted in pre-evolutionary idealistic morphology. The claim that the goal of idealistic morphology was the seriability of form may sound paradoxical given that this discipline proceeded within a framework of strictly delimited types.
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Endeavour, 1980
Abstract The life of animals can be sustained only if the cellular environment can be closely controlled. Elaborate processes have, therefore, been evolved to detect and eliminate foreign material in the body, including tumour cells. An understanding of these processes is of great medical importance.
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Abstract The life of animals can be sustained only if the cellular environment can be closely controlled. Elaborate processes have, therefore, been evolved to detect and eliminate foreign material in the body, including tumour cells. An understanding of these processes is of great medical importance.
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A PHYLOGENY OF THE BASIDIOMYCETES
Canadian Journal of Botany, 1955Thirteen phylogenetic principles of general or mycologicai application are presented. Adherence to these principles makes it difficult to accept any starting point for the Basidiomycetes other than a primitive ascomycete very close to Taphrina and parasitic upon ancient ferns. From the ancestral basidiomycete one line led to the rusts and another, via
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THE PHYLOGENY OF THE SALIENTIA
Biological Reviews, 1963Summary1. The essentially recent skeletal patterns of fossil Salientia indicates that the evolutionary relationships of the order must continue to be assessed on evidence obtained chiefly from a study of recent forms.2. The morphology and morphogenesis of the more important criteria employed in taxonomic analyses are described.
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2008
Grid computing defines the combination of computers or clusters of computers across networks, like the internet, to form a distributed supercomputer. This infrastructure allows scientists to process complex and time consuming computations in parallel on demand.
van der Wath, R. C. +6 more
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Grid computing defines the combination of computers or clusters of computers across networks, like the internet, to form a distributed supercomputer. This infrastructure allows scientists to process complex and time consuming computations in parallel on demand.
van der Wath, R. C. +6 more
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Science, 1961
The systematic position of the small invertebrate group, Priapulida, is uncertain. In more recent publications they are classified usually as pseudocoelomates in the division Aschelminthes. A histological investigation of Priapulus caudatus , a widely distributed species, reveals the body cavity to be a coelom, its ...
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The systematic position of the small invertebrate group, Priapulida, is uncertain. In more recent publications they are classified usually as pseudocoelomates in the division Aschelminthes. A histological investigation of Priapulus caudatus , a widely distributed species, reveals the body cavity to be a coelom, its ...
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Fossils in Phylogeny: Phylogeny Reconstruction in Paleontology.
Science, 1987openaire +2 more sources
2001
Abstract The title of this chapter is a word that is used frequently by biologists to refer to the origin (i.e., genesis) of phyla (traditionally, kinds of organisms). On the basis of its etymology, the word could be used for any or all aspects of the origins of biological diversity, but in modern parlance, it usually refers to a ...
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Abstract The title of this chapter is a word that is used frequently by biologists to refer to the origin (i.e., genesis) of phyla (traditionally, kinds of organisms). On the basis of its etymology, the word could be used for any or all aspects of the origins of biological diversity, but in modern parlance, it usually refers to a ...
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