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Skin color is perhaps the most decisive and abused physical characteristic of humankind. This book presents a multidisciplinary overview of how and why human populations vary so markedly in their skin color. The biological aspects of the pigment cell and its production of melanin are reviewed. The functions of melanin in the skin, brain, eye and ear are considered, and the common clinical abnormalities of pigmentation, such as albinism, are described and illustrated. Detailed reflectance data from worldwide surveys of skin color are also presented. Next, historical and contemporary backgrounds of the phenomenon are explored in relation to the so-called color problem in society. Finally, the possible evolutionary forces that shape human pigmentation are assessed.
First published in 1988. During the past decade there has been a marked increase in the number of North American and European laboratories engaged in the study of social learning. As a consequence, evidence is rapidly accumulating that in animals, as in humans, social interaction plays an important role in facilitating development of adaptive patterns of behavior. Experimenters are isolated both by the phenomena they study and by the species with which they work. The process of creating a coherent field out of the diversity of current social learning research is likely to be both long and difficult. It the authors’ hope, that the present volume may prove a useful first step in bringing order to a diverse field.
This authored monograph introduces a genuinely theoretical approach to biology. Starting point is the investigation of empirical biological scaling including their variability, which is found in the literature, e.g. allometric relationships, fractals, etc. The book then analyzes two different aspects of biological time: first, a supplementary temporal dimension to accommodate proper biological rhythms; secondly, the concepts of protension and retention as a means of local organization of time in living organisms. Moreover, the book investigates the role of symmetry in biology, in view of its ubiquitous importance in physics. In relation with the notion of extended critical transitions, the book proposes that organisms and their evolution can be characterized by continued symmetry changes, which accounts for the irreducibility of their historicity and variability. The authors also introduce the concept of anti-entropy as a measure for the potential of variability, being equally understood as alterations in symmetry. By this, the book provides a mathematical account of Gould's analysis of phenotypic complexity with respect to biological evolution. The target audience primarily comprises researchers interested in new theoretical approaches to biology, from physical, biological or philosophical backgrounds, but the book may also be beneficial for graduate students who want to enter this field.
Individuals are things that everybody knows—or thinks they do. Yet even scholars who practice or analyze the biological sciences often cannot agree on what an individual is and why. One reason for this disagreement is that the many important biological individuality concepts serve very different purposes—defining, classifying, or explaining living structure, function, interaction, persistence, or evolution. Indeed, as the contributors to Biological Individuality reveal, nature is too messy for simple definitions of this concept, organisms too quirky in the diverse ways they reproduce, function, and interact, and human ideas about individuality too fraught with philosophical and historical meaning. Bringing together biologists, historians, and philosophers, this book provides a multifaceted exploration of biological individuality that identifies leading and less familiar perceptions of individuality both past and present, what they are good for, and in what contexts. Biological practice and theory recognize individuals at myriad levels of organization, from genes to organisms to symbiotic systems. We depend on these notions of individuality to address theoretical questions about multilevel natural selection and Darwinian fitness; to illuminate empirical questions about development, function, and ecology; to ground philosophical questions about the nature of organisms and causation; and to probe historical and cultural circumstances that resonate with parallel questions about the nature of society. Charting an interdisciplinary research agenda that broadens the frameworks in which biological individuality is discussed, this book makes clear that in the realm of the individual, there is not and should not be a direct path from biological paradigms based on model organisms through to philosophical generalization and historical reification.
Questions why species are becoming extinct, and how we can protect the natural world on which we all depend.
In the spring of 2011, a diverse group of scientists gathered at Cornell University to discuss their research into the nature and origin of biological information. This symposium brought together experts in information theory, computer science, numerical simulation, thermodynamics, evolutionary theory, whole organism biology, developmental biology, molecular biology, genetics, physics, biophysics, mathematics, and linguistics. This volume presents new research by those invited to speak at the conference. The contributors to this volume use their wide-ranging expertise in the area of biological information to bring fresh insights into the explanatory difficulties that biological information raises. Going beyond the conventional scientific wisdom, which attempts to explain biological information reductionistically via chemical, genetic, and natural selective determinants, the work represented here develops novel non-reductionist approaches to biological information, looking notably to telic and self-organizational processes. Several clear themes emerged from these research papers: 1) Information is indispensable to our understanding of what life is. 2) Biological information is more than the material structures that embody it. 3) Conventional chemical and evolutionary mechanisms seem insufficient to fully explain the labyrinth of information that is life. By exploring new perspectives on biological information, this volume seeks to expand, encourage, and enrich research on the nature and origin of biological information.
The essays in this collection deploy biological and social scientific perspectives to evaluate the transformative experience of parenthood for today's women and men. They map the similar and distinct roles mothers and fathers play in their children's lives and measure the effect of gendered parenting on child well-being, work and family arrangements, and the quality of couples' relationships. Contributors describe what happens to brains and bodies when women become mothers and men become fathers; whether the stakes are the same or different for each sex; why, across history and cultures, women are typically more involved in childcare than men; why some fathers are strongly present in their children's lives while others are not; and how the various commitments men and women make to parenting shape their approaches to paid work and romantic relationships. Considering recent changes in men's and women's familial duties, the growing number of single-parent families, and the impassioned tenor of same-sex marriage debates, this book adds sound scientific and theoretical insight to these issues, constituting a standout resource for those interested in the causes and consequences of contemporary gendered parenthood.
Biological Distance Analysis: Forensic and Bioarchaeological Perspectives synthesizes research within the realm of biological distance analysis, highlighting current work within the field and discussing future directions. The book is divided into three main sections. The first section clearly outlines datasets and methods within biological distance analysis, beginning with a brief history of the field and how it has progressed to its current state. The second section focuses on approaches using the individual within a forensic context, including ancestry estimation and case studies. The final section concentrates on population-based bioarchaeological approaches, providing key techniques and examples from archaeological samples. The volume also includes an appendix with additional resources available to those interested in biological distance analyses. - Defines datasets and how they are used within biodistance analysis - Applies methodology to individual and population studies - Bridges the sub-fields of forensic anthropology and bioarchaeology - Highlights current research and future directions of biological distance analysis - Identifies statistical programs and datasets for use in biodistance analysis - Contains cases studies and thorough index for those interested in biological distance analyses
This text provides comprehensive coverage of biological aspects of human ageing at a level accessible to students with little or no science background. It is aimed at students pursuing a career working with, or for, the elderly. Each system is covered in its own chapter. Individual chapters present the structure and function of each body system, followed by natural age changes, and conclude with abnormal changes or diseased conditions of the elderly. Homeostasis is a unifying theme throughout the text: systems are presented relative to the body's ability to maintain homeostasis and good health is the main theme.