J. M. Dodd – författare
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6 produkter
6 produkter
E-bok
PDF, Engelska, 20131 408 kr
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What, precisely, is a primitive fish? Most biologists would agree that the living cyclostomes, selachians, crossopterygians, etc. cannot be considered truly primitive. However, they and the fossil record have served to provide the information which forms the basis for speculation concerning the nature of the original vertebrates. This symposium of biologists from a variety of disciplines was called together to create collectively, from the best available current evidence, a picture of the probable line of evolution of the prototype primitive fishes. The symposium was designed to follow one that took place in Stockholm in 1967, convened for a similar purpose, with about the same number of participants. It is a matter of interest that almost the entire 1967 symposium (Nobel Symposium 4) dealt only with the hard tissues, whether fossil or modern. In charting the course of the present symposium it was felt that the intervening years have produced numerous lines of new evidence that could be employed in the same way that a navigator determines his position. Each field, be it adult morphology, geology, ecology, biochemistry, development or physiology, generates evidence that can be extrapolated backward from existing vertebrate forms and forward from invertebrate forms. If the intersect of only two lines of evidence produces a navigational "fix" of rather low reliability, then an intersect, however unfocussed, of multiple guidelines from more numerous disciplines might provide a better position from which to judge early vertebrate history.
Häftad, Engelska, 2012
1 123 kr
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What, precisely, is a primitive fish? Most biologists would agree that the living cyclostomes, selachians, crossopterygians, etc. cannot be considered truly primitive. However, they and the fossil record have served to provide the information which forms the basis for speculation concerning the nature of the original vertebrates. This symposium of biologists from a variety of disciplines was called together to create collectively, from the best available current evidence, a picture of the probable line of evolution of the prototype primitive fishes. The symposium was designed to follow one that took place in Stockholm in 1967, convened for a similar purpose, with about the same number of participants. It is a matter of interest that almost the entire 1967 symposium (Nobel Symposium 4) dealt only with the hard tissues, whether fossil or modern. In charting the course of the present symposium it was felt that the intervening years have produced numerous lines of new evidence that could be employed in the same way that a navigator determines his position. Each field, be it adult morphology, geology, ecology, biochemistry, development or physiology, generates evidence that can be extrapolated backward from existing vertebrate forms and forward from invertebrate forms. If the intersect of only two lines of evidence produces a navigational "fix" of rather low reliability, then an intersect, however unfocussed, of multiple guidelines from more numerous disciplines might provide a better position from which to judge early vertebrate history.
E-bok
PDF, Engelska, 2013344 kr
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Living Embryos: An Introduction to the Study of Animal Development, Revised Second Edition presents the processes of development as seen throughout the animal kingdom. This book discusses the development of the organ systems of vertebrates. Comprised of 41 chapters, this edition starts with an overview of the history of the study of embryology, which is concerned with the process by which the adult arises from the fertilized egg. This text then discusses the role of the sperm in the determination of bilateral symmetry. Other chapters consider the development of the frog in order to give a basis for comparison with other species. This book discusses as well the structure of the hen''s egg and illustrates the various stages of the development of the chick. The final chapter deals with animal evolution, which produces a wide variety of animal forms. Embryologists, zoologists, medical students, graduate students, university lecturers, and teachers will find this book extremely useful.
E-bok
PDF, Engelska, 2013756 kr
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In Quest of Man: A Biological Approach to the Problem of Man''s Place in Nature presents man''s essential nature to take part in cultural evolution as well as in biological evolution. This book provides the framework for the understanding of living things in general. Organized into four parts encompassing 21 chapters, this book begins with an overview of the principle that started and governed the particular process of human cultural evolution. This text then discusses, in the light of human evolution, man''s place in nature, his evolutionary career, and his natural destination. Other chapters consider the underlying compulsory principle that is appropriately called as the principle of body-compulsion. This book discusses as well the exposition of the exclusive principle that is responsible for the singular heterogeneity of human evolution. The final chapter deals with the argument that manlikeness of apes is an essential animal attribute, which refers to a certain resemblance to the human form and does not imply nor mean identity. This book is a valuable resource for scientists, sociologists, biologists, and geneticists.
E-bok
PDF, Engelska, 2013354 kr
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Living Tissues: An Introduction to Functional Histology discusses the fundamental concepts that are essential in studying organic tissues. The text first deals with the microscopic study of tissues, and then proceeds to talking about the components of tissues. Next, the book details the organization of tissues, along with the differentiation of cells and tissues. The text will be of great use to students of biology related degrees, such as biochemistry, biological engineering, and medicine.
E-bok
Engelska, 2014756 kr
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The Foundations of Genetics describes the historical development of genetics with emphasis on the contributions to advancing genetical knowledge and the various applications of genetics. The book reviews the work of Gregor Mendel, his Law of Segregation, and of Ernst Haeckel who suggested that the nucleus is that part of the cell that is responsible for heredity. The text also describes the studies of W. Johannsen on "pure lines," and his introduction of the terms gene, genotype, and phenotype. The book explains the theory of the gene and the notion that hereditary particles are borne by the chromosomes (Sutton-Boveri hypothesis). Of the constituent parts of the nucleus only the chromatin material divides at mitosis and segregates during maturation. Following studies confirm that the chromatin material, present in the form of chromosomes with a constant and characteristic number and appearance for each species, is indeed the hereditary material. The book describes how Muller in 1927, showed that high precision energy radiation is the external cause to mutation in the gene itself if one allele can mutate without affecting its partner. The superstructure of genetics built upon the foundations of Mendelism has many applications including cytogenetics, polyploidy, human genetics, eugenics, plant breeding, radiation genetics, and the evolution theory. The book can be useful to academicians and investigators in the fields of genetics such as biochemical, biometrical, microbial, and pharmacogenetics. Students in agriculture, anthropology, botany, medicine, sociology, veterinary medicine, and zoology should add this text to their list of primary reading materials.