Results for 'Branch speciation'

943 found
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  1.  43
    Speciation: Goldschmidt’s Chromosomal Heresy, Once Supported by Gould and Dawkins, is Again Reinstated.Donald R. Forsdyke - 2017 - Biological Theory 12 (1):4-12.
    The view that the initiation of branching into two sympatric species may not require natural selection emerged in Victorian times. In the 1980s paleontologist Stephen Jay Gould gave a theoretical underpinning of this nongenic “chromosomal” view, thus reinstating Richard Goldschmidt’s “heresy” of the 1930s. From modeling studies with computer-generated “biomorphs,” zoologist Richard Dawkins also affirmed Goldschmidt, proclaiming the “evolution of evolvability.” However, in the 1990s, while Gould and Dawkins were recanting, bioinformatic, biochemical, and cytological studies were providing a deeper underpinning. (...)
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  2.  32
    Base Composition, Speciation, and Why the Mitochondrial Barcode Precisely Classifies.Donald R. Forsdyke - 2017 - Biological Theory 12 (3):157-168.
    While its mechanism and biological significance are unknown, the utility of a short mitochondrial DNA sequence as a “barcode” providing accurate species identification has revolutionized the classification of organisms. Since highest accuracy was achieved with recently diverged species, hopes were raised that barcodes would throw light on the speciation process. Indeed, a failure of a maternally donated, rapidly mutating, mitochondrial genome to coadapt its gene products with those of a paternally donated nuclear genome could result in developmental failure, thus (...)
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  3. The myth of bacterial species and speciation.Jeffrey G. Lawrence & Adam C. Retchless - 2010 - Biology and Philosophy 25 (4):569-588.
    The Tree of Life hypothesis frames the evolutionary process as a series of events whereby lineages diverge from one another, thus creating the diversity of life as descendent lineages modify properties from their ancestors. This hypothesis is under scrutiny due to the strong evidence for lateral gene transfer between distantly related bacterial taxa, thereby providing extant taxa with more than one parent. As a result, one argues, the Tree of Life becomes confounded as the original branching structure is gradually superseded (...)
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  4.  63
    Specialisation by Value Divergence: The Role of Epistemic Values in the Branching of Scientific Disciplines.Matteo De Benedetto & Michele Luchetti - 2023 - International Studies in the Philosophy of Science 36 (2):121-141.
    According to Kuhn's speciation analogy, scientific specialisation is fundamentally analogous to biological speciation. In this paper, we extend Kuhn's original language-centred formulation of the speciation analogy, to account for episodes of scientific specialisation centred around methodological differences. Building upon recent views in evolutionary biology about the process of speciation by genetic divergence, we will show how these methodology-centred episodes of scientific specialisation can be understood as cases of specialisation driven by value divergence. We will apply our (...)
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  5. Linear Versus Branching Depictions of Evolutionary History: Implications for Diagram Design.Laura R. Novick, Courtney K. Shade & Kefyn M. Catley - 2011 - Topics in Cognitive Science 3 (3):536-559.
    This article reports the results of an experiment involving 108 college students with varying backgrounds in biology. Subjects answered questions about the evolutionary history of sets of hominid and equine taxa. Each set of taxa was presented in one of three diagrammatic formats: a noncladogenic diagram found in a contemporary biology textbook or a cladogram in either the ladder or tree format. As predicted, the textbook diagrams, which contained linear components, were more likely than the cladogram formats to yield explanations (...)
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  6.  92
    Experimentalists and naturalists in twentieth-century botany: Experimental taxonomy, 1920?1950.Joel B. Hagen - 1984 - Journal of the History of Biology 17 (2):249-270.
    Experimental taxonomy was a diverse area of research, and botanists who helped develop it were motivated by a variety of concerns. While experimental taxonomy was never totally a taxonomic enterprise, improvement in classification was certainly one major motivation behind the research. Hall's and Clements' belief that experimental methods added more objectivity to classification was almost universally accepted by experimental taxonomists. Such methods did add a new dimension to taxonomy — a dimension that field and herbarium studies, however rigorous, could not (...)
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  7.  79
    Does Species Evolution Follow Scale Laws? First Applications of the Scale Relativity Theory to Fossil and Living-beings.Jean Chaline - 2010 - Foundations of Science 15 (3):279-302.
    We have demonstrated, using the Cantor dust method, that the statistical distribution of appearance and disappearance of rodents species (Arvicolid rodent radiation in Europe) follows power laws strengthening the evidence for a fractal structure set. Self-similar laws have been used as model for the description of a huge number of biological systems. With Nottale we have shown that log-periodic behaviors of acceleration or deceleration can be applied to branching macroevolution, to the time sequences of major evolutionary leaps (global life tree, (...)
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  8.  31
    Unraveling recombination rate evolution using ancestral recombination maps.Kasper Munch, Mikkel H. Schierup & Thomas Mailund - 2014 - Bioessays 36 (9):892-900.
    Recombination maps of ancestral species can be constructed from comparative analyses of genomes from closely related species, exemplified by a recently published map of the human‐chimpanzee ancestor. Such maps resolve differences in recombination rate between species into changes along individual branches in the speciation tree, and allow identification of associated changes in the genomic sequences. We describe how coalescent hidden Markov models are able to call individual recombination events in ancestral species through inference of incomplete lineage sorting along a (...)
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  9.  5
    Molecular evidence for the early divergence of placental mammals.Simon Easteal - 1999 - Bioessays 21 (12):1052-1058.
    Paleontological and molecular data suggest quite different patterns for the early evolution of placental mammals. Paleontological evidence indicates a radiation, with most of the extant orders diverging at approximately the same time, close to the Cretaceous-Tertiary boundary, 65 Myr ago. Molecular evidence suggests a branching pattern of evolution that started much earlier. Resolving this discrepancy requires a consideration of the assumptions that underlie both approaches. It is argued here that the pattern indicated by the molecular approach is the most likely (...)
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  10. Seeing the Forest for the trees. [REVIEW]Anya Plutynski - 2004 - Biology and Philosophy 19 (2):299-303.
    Roderic Page’s new book, Tangled Trees: Phylogeny, Cospeciation and Coevolution (2003), is a worthwhile read for anyone interested in either methodological issues in systematics, or how organisms shape one another’s selective environments. “Cospeciation,” for the uninitiated, is the concurrent speciation of two or more lineages that are ecologically associated (e.g. host-parasite associations, as well as mutualistic or symbiotic associations). “Coevolution,” in contrast, is the reciprocal adaptation of hosts and parasite taxa. The main focus of Page’s book is thus when, (...)
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  11.  62
    Speciation and the neutral theory of biodiversity.Michael Kopp - 2010 - Bioessays 32 (7):564-570.
    The neutral theory of biodiversity purports that patterns in the distribution and abundance of species do not depend on adaptive differences between species (i.e. niche differentiation) but solely on random fluctuations in population size (“ecological drift”), along with dispersal and speciation. In this framework, the ultimate driver of biodiversity is speciation. However, the original neutral theory made strongly simplifying assumptions about the mechanisms of speciation, which has led to some clearly unrealistic predictions. In response, several recent studies (...)
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  12.  50
    Speciation Post Synthesis: 1960–2000.Anya Plutynski - 2019 - Journal of the History of Biology 52 (4):569-596.
    Speciation—the origin of new species—has been one of the most active areas of research in evolutionary biology, both during, and since the Modern Synthesis. While the Modern Synthesis certainly shaped research on speciation in significant ways, providing a core framework, and set of categories and methods to work with, the history of work on speciation since the mid-twentieth century is a history of divergence and diversification. This piece traces this divergence, through both theoretical advances, and empirical insights (...)
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  13. Speciation and Macroevolution.Anya Plutynski - 2008 - In Sahorta Sarkar & Anya Plutynski, Companion to the Philosophy of Biology. Blackwell. pp. 169–185.
    Speciation is the process by which one or more species arises from a common ancestor, and “macroevolution” refers to patterns and processes at and above the species level – or, transitions in higher taxa, such as new families, phyla or genera. “Macroevolution” is contrasted with “microevolution,” evolutionary change within populations, due to migration, assortative mating, selection, mutation and drift. In the evolutionary synthesis of the 1930’s and 40’s, Haldane , Dobzhansky , Mayr , and Simpson argued that the origin (...)
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  14. Why Trust Raoult? How Social Indicators Inform the Reputations of Experts.T. Y. Branch, Gloria Origgi & Tiffany Morisseau - 2022 - Social Epistemology 36 (3):299-316.
    The COVID-19 crisis has highlighted the considerable challenge of sourcing expertise and determining which experts to trust. Dissonant information fostered controversy in public discourse and encouraged an appeal to a wide range of social indicators of trustworthiness in order to decide whom to trust. We analyze public discourse on expertise by examining how social indicators inform the reputation of Dr. Didier Raoult, the French microbiologist who rose to international prominence as an early advocate for using hydroxychloroquine to treat COVID-19. To (...)
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  15.  29
    Misrepresenting behaviorism.Marc N. Branch - 1982 - Behavioral and Brain Sciences 5 (3):372-373.
  16. Rethinking the Conceptual Space for Science in Society after the VFI.T. Y. Branch & Heather Douglas - 2023 - Philosophy of Science.
    Replacing the value-free ideal (VFI) for science requires attention to the broader understanding of how science in society should function. In public spaces, science needed to project the VFI in norms for science advising, science education, and science communication. This resulted in the independent science advisor model and a focus on science literacy for science education and communication. Attending to these broader implications of the VFI which structure science and society relationships is crucial if we are to properly replace the (...)
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  17. Enhanced Epistemic Trust and the Value-Free Ideal as a Social Indicator of Trust.T. Y. Branch - 2022 - Social Epistemology 36 (5):561-575.
    Publics trust experts for personal and pro-social reasons. Scientists are among the experts publics trust most, and so, epistemic trust is routinely afforded to them. The call for epistemic trust to be more socially situated in order to account for the impact of science on society and public welfare is at the forefront of enhanced epistemic trust. I argue that the value-free ideal for science challenges establishing enhanced epistemic trust by preventing the inclusion of non-epistemic values throughout the evaluation of (...)
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  18.  62
    Speciation through cytonuclear incompatibility: Insights from yeast and implications for higher eukaryotes.Jui-Yu Chou & Jun-Yi Leu - 2010 - Bioessays 32 (5):401-411.
    Several features of the yeast mitochondrial genome, including high mutation rate, dynamic genomic structure, small effective population size, and dispensability for cellular viability, make it a promising candidate for generating hybrid incompatibility and driving speciation. Cytonuclear incompatibility, a specific type of Dobzhansky‐Muller genetic incompatibility caused by improper interactions between mitochondrial and nuclear genomes, has previously been observed in a variety of organisms, yet its role in speciation remains obscure. Recent studies in Saccharomyces yeast species provide a new insight, (...)
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  19.  19
    Speciation and inversions: Chimps and humans.Jody Hey - 2003 - Bioessays 25 (9):825-828.
    A new set of models has resurrected a role for chromosomal inversions in the formation of new species.1-3 Traditional models, which are generally considered to be unlikely in most cases, had imagined that inversions might aid speciation by directly causing low hybrid fitness. In contrast, the newer models focus on the effect that inversions have on local recombination rates. A test of these models found a strikingly high rate of amino-acid substitution within regions where humans and chimpanzees differ by (...)
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  20. Uganda's Civil War and the Politics of ICC Intervention.Adam Branch - 2007 - Ethics and International Affairs 21 (2):179-198.
    The International Criminal Court's intervention into the ongoing civil war in northern Uganda evoked a chorus of confident predictions as to its capacity to bring peace and justice to the war-torn region. However, this optimism is unwarranted.
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  21.  17
    The Ethics of an Ordinary Doctor.William T. Branch - 2014 - Hastings Center Report 44 (1):15-17.
    I served as a medical student and resident in the 1960s. Science as a belief system had reached a pinnacle. Yet Not infrequently in those days, I found myself caring, with little available backup, for a hospital ward filled with sick and dying people. It was a lonely and often frightening responsibility. I began to encounter situations that were at odds with our collective certainty that science would provide the answers. Some of these memories I repressed for almost a decade. (...)
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  22.  21
    Searching for Sympatric Speciation in the Genomic Era.Emilie J. Richards, Maria R. Servedio & Christopher H. Martin - 2019 - Bioessays 41 (7):1900047.
    Sympatric speciation illustrates how natural and sexual selection may create new species in isolation without geographic barriers. However, recent genomic reanalyses of classic examples of sympatric speciation reveal complex histories of secondary gene flow from outgroups into the radiation. In contrast, the rich theoretical literature on this process distinguishes among a diverse range of models based on simple genetic histories and different types of reproductive isolating barriers. Thus, there is a need to revisit how to connect theoretical models (...)
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  23. Social Indicators of Trust in the Age of Informational Chaos.T. Y. Branch & Gloria Origgi - 2022 - Social Epistemology 36 (5):533-540.
    Expert knowledge regularly informs personal and civic-decision making. To decide which experts to trust, lay publics —including policymakers and experts from other domains—use different epistemic and non-epistemic cues. Epistemic cues such as honesty, like when experts are forthcoming about conflicts of interest, are a popular way of understanding how people evaluate and decide which experts to trust. However, many other epistemic cues, like the evidence supporting information from experts, are inaccessible to lay publics. Therefore, lay publics simultaneously use second-order social (...)
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  24.  56
    Ecocide, the Anthropocene, and the International Criminal Court.Adam Branch & Liana Minkova - 2023 - Ethics and International Affairs 37 (1):51-79.
    The recent proposal by the Independent Expert Panel of the Stop Ecocide initiative to include the crime of ecocide in the International Criminal Court's Rome Statute has raised expectations for preventing and remedying severe environmental harm through international prosecution. As alluring as this image is, we argue that ecocide prosecutions may be the most difficult, perhaps even impossible, in precisely the cases that the ICC would need to be concerned with; namely, the gravest global incidents of environmental harm, including those (...)
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  25.  42
    La masculinité à l’épreuve de la guerre sans nom.Raphaëlle Branche - 2004 - Clio 20:111-122.
    La guerre d’Algérie a été l’occasion d’une remise en cause de l’image traditionnelle du combattant. Ni les formes de combat, ni les activités demandées aux soldats français, ni les ennemis qu’on les chargeait de poursuivre ne pouvaient les conforter dans l’image que les appelés du contingent avaient du statut militaire. Ces décalages eurent des conséquences sur les modèles de masculinité élaborés et éprouvés pendant la guerre, que ce soit entre hommes ou par rapport aux femmes.
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  26.  39
    Preference for a hypothesis: Is the case “closed”?Marc N. Branch - 1985 - Behavioral and Brain Sciences 8 (2):332-333.
  27.  47
    American Morality over International Law: Origins in UN Military Interventions, 1991–1995.Adam Branch - 2005 - Constellations 12 (1):103-127.
  28.  3
    Learning deeply from empiricist philosophers.Glenn Branch - forthcoming - Metascience:1-4.
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  29.  51
    Dissecting post‐mating prezygotic speciation phenotypes.Kerry L. Shaw & Jonathan M. Lambert - 2014 - Bioessays 36 (11):1050-1053.
    Darwin's “mystery of mysteries,” the origin of species, is caused by the evolution of speciation phenotypes, i.e. phenotypic differences that depress gene flow between daughter species during speciation. Postmating, prezygotic (PMPZ) differentiation characterizes many closely related species causing conspecific sperm precedence (CSP), wherein a female preferentially utilizes conspecific over heterospecific sperm in fertilization. Until recently, the components of CSP have been difficult to observe and study in internally fertilizing organisms. Research into the mechanisms of CSP is now progressing (...)
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  30.  25
    Another hippocampal theory.Marc N. Branch - 1985 - Behavioral and Brain Sciences 8 (3):497-498.
  31.  16
    Add Professors and Stir.William T. Branch & Richard T. Pels - 1995 - Hastings Center Report 25 (1):49-49.
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  32.  25
    A theory in need of defense.Marc N. Branch - 1982 - Behavioral and Brain Sciences 5 (4):678-679.
  33.  24
    Buddhism in Taiwan: Religion and the State, 1660-1990 (review).Robert Branch - 2001 - Buddhist-Christian Studies 21 (1):133-134.
    In lieu of an abstract, here is a brief excerpt of the content:Buddhist-Christian Studies 21.1 (2001) 133-134 [Access article in PDF] Book Review Buddhism in Taiwan: Religion and the State, 1660-1990 Buddhism in Taiwan: Religion and the State, 1660-1990. By Charles B.Jones. Honolulu: University of Hawaii Press, 1999. 233 pp. Charles Jones spent over three years living in Taiwan pursuing the research for this book and for journal articles about religion on the island. He is currently on the faculty of (...)
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  34. By Unknoum Ways.W. G. Branch - 1946
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  35.  27
    Concept Development: A Primer.John Branch & Francesco Rocchi - 2015 - Philosophy of Management 14 (2):111-133.
    Concepts serve critical functions in science, through their descriptive powers and as the building-blocks of theory. When concepts are immature, therefore, science suffers. Consequently, concept development ought to be considered a fundamental scientific activity. Knowledge of different approaches to concept development, however, is relatively limited in the management discipline. The purpose of this article, therefore, is to provide a primer on concept development. It begins by establishing the link between concepts and science. It then describes and discusses the main approaches (...)
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  36.  21
    Darwinning Hearts and Minds.Glenn Branch - 2016 - Science & Education 25 (3-4):437-442.
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  37. Enhancement of conditioned reinforcement during repeated exposure to cocaine.Mn Branch - 1991 - Bulletin of the Psychonomic Society 29 (6):524-524.
     
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  38.  44
    Gaining (on) momentum.Marc N. Branch - 2000 - Behavioral and Brain Sciences 23 (1):92-93.
    Nevin & Grace's approach is an interesting and useful attempt to find ways to measure “core” effects of a history of exposure to reinforcement. The momentum analogy makes intuitive sense, and the evidence for its utility is increasing. Several questions remain, however, about how the analogy will fare in the case of concurrent rather than sequential activities, about the use of extinction as a method to test resistance to change, and about the generality of some of the effects.
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  39.  24
    Human Nature after Darwin: A Philosophical Introduction.Glenn Branch - 2003 - Philosophy Now 40:44-46.
  40.  72
    Introduction.Glenn Branch - 2011 - Synthese 178 (2):171 - 176.
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  41.  71
    In Defense of Methodological Naturalism.Glenn Branch - 2002 - Philo 5 (2):249-255.
    According to Theodore Schick, Jr., Eugenie C. Scott’s endorsement of methodological naturalism---roughly, the view that science is limited by its methodology to be neutral vis-à-vis the supernatural---is misguided. He offers three arguments; I contend that none is successful.
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  42. John B. Cobb Jr., ed. Back to Darwin: A Richer Account of Evolution Reviewed by.Glenn Branch - 2009 - Philosophy in Review 29 (2):89-91.
     
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  43.  24
    Jeroen de Ridder, Rik Peels, and Rene van Woudenberg, eds., "Scientism: Prospects and Problems.".Glenn Branch - 2020 - Philosophy in Review 40 (3):107-109.
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  44. JJ MacIntosh, ed. Boyle on Atheism Reviewed by.Glenn Branch - 2007 - Philosophy in Review 27 (5):359-361.
  45. Kenneth Williford (ed). 'Hume’s Dialogues Concerning Natural Religion: A Philosophical Appraisal'.Glenn Branch - 2025 - Philosophy in Review 45 (1):41-44.
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  46.  52
    Matching and melioration as accounts of reinforcement and drug addiction.Marc N. Branch - 1996 - Behavioral and Brain Sciences 19 (4):577-578.
    Heyman's view that addiction can be viewed as a natural outcome predictable by melioration and the matching law is provocative. Remaining to be explained more fully, however, are exactly how his view is an improvement on other reinforcement-based accounts. Included in these elaborations should be an account of how different “bookkeeping schemes” are developed and controlled and what new approaches to treatment and prevention of drug addiction are indicated.
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  47.  28
    Michael Ruse, ed. , The Oxford Handbook of Philosophy of Biology . Reviewed by.Glenn Branch - 2011 - Philosophy in Review 31 (6):452-454.
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  48.  55
    Observing observing.Marc N. Branch - 1983 - Behavioral and Brain Sciences 6 (4):705.
  49.  11
    Peter Vickers, "Identifying Future-Proof Science.".Glenn Branch - 2024 - Philosophy in Review 44 (1):55-58.
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  50.  16
    Richard Joyce , The Routledge Handbook of Evolution and Philosophy. Reviewed by.Glenn Branch - 2018 - Philosophy in Review 38 (3):109-111.
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