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Search results for: biolog* in all categories
664 results found.
67 pages of results.
41. Catastrophism and Evolution [Journals] [SIS Review]
... " . Not everyone accepts that the fossil evidence supports punctuated equilibrium rather than phyletic gradualism . However, almost everyone in the field of evolutionary biology agrees that natural selection plays an important role in evolution, regardless of the precise mechanism involved. Most would also be prepared to concede that genetic drift, the random ... end of ice ages . [* See "Showers of Glass", p. 8 in this issue.] Nevertheless, the prevailing tendency of evolutionary biologists has been to follow Darwin's belief that "Nature does not make jumps" , a dictum attributable to Linnaeus. The Modern Synthesis, or neo-Darwinism, ...
42. The Continuing Evolution of Evolution [Journals] [SIS Review]
... standard textbook written by Mark Ridley of Emory University, Atlanta, Georgia. Despite the book running to 650 pages, very few details are provided of modern developments in molecular biology, far greater space being devoted to more traditional topics such as population genetics. Nevertheless, jumping genes (transposons) receive a mention, and it is acknowledged that ... important pictures have been (and still are) in shaping our perceptions about evolution. The written word is not ignored, however, with chapters contributed by such eminent evolutionary biologists as Michael Benton, John Sepkoski Jr., Christine Janis, Peter Andrews and Christopher Stringer. In the Introduction, which is intended to provide a perspective, Benton ...
43. Polymathics and Catastrophism: A Multidisciplinary Approach to Problems of Evolutionary Theory [Journals] [Kronos]
... the humanities and the life sciences. Moreover, it embraces several highly distinctive subdisciplines, of which the most widely recognized in America are: ethnology, prehistoric archeology, human biology, and linguistics. Nonetheless, broad as anthropology is, I soon found it too narrow to deal adequately with the subject of the role of global catastrophes in shaping ... radical discontinuity with the evolutionary past are, in order of decisiveness: (1 ) extinction, (2 ) speciation, and (3 ) biotic dominance. Unfortunately, biologists are inconsistent in their use of these terms, with the result that further qualifications and distinctions need to be made before they can be employed without ambiguity. The most ...
44. Scientific Prehistory [Books]
... of coal, oil and fossils, over-thrusting and stacking of strata, for instance, in the Canadian Rockies, and other geologic information substantiate this novel reconstruction of Prehistory. Biological Prehistory is discussed from time implication and a central argument that spontaneous generation and organic evolution go counter to `time's arrow'. Differentiation, adaptation, mutations vs. ... by evolution is to use the words of Julian Huxley. He was not only a recognized spokesman of organic evolution but came by this title by right of training as a biologist of renown. He was lecturer at the University of London, keynote speaker of the centennial celebration of Darwinism at the University of Chicago in 1959, and by right ...
45. Nemesis for Evolutionary Gradualism? [Books]
... arguments were objective and had a firm scientific foundation: "The other brand of theory involves a careful consideration of all the evidence that can be accumulated, drawing both from biology and geology. These more synthetic theories tend to be less exciting but are more likely to approximate to what actually occurred. They are not as popular as the cosmic ... . Then, of course, there are the arguments between advocates of terrestrial and extraterrestrial models of catastrophism, as well as those defending gradualism. Some evolutionary biologists have reacted angrily at seeing their territory invaded by experts from other fields. In The Nemesis Affair, David Raup quoted fellow palaeontologist, Bob Bakker, as saying: ...
46. A Third Alternative [Journals] [Kronos]
... just not the case that there has been any "firmly established .. . confirmation of the principle of natural selection" as "an essential part of the process of biological evolution", and it is just not the case that "there are no alternative theories .. . that any competent biologist of today takes seriously". There ... increasing numbers of competent biologists and other scientists of today who are taking very seriously the alternative theory of cataclysmic evolution presented by Immanuel Velikovsky in 1955 in his Earth in Upheaval. Velikovsky shows that newer species have indeed descended from older species, but in discrete and sudden leaps rather than in continuous and slow transitions. The mechanism for the formation ...
47. For the Record. . . [Journals] [Kronos]
... sometimes carrying a potential of a hundred billion electron volts. . . it is conceivable that, where a cosmic ray or charge hits a gene of germ plasma, a biological mutation takes place, comparable to the physical transmutation of the elements. After all, the genes, like any proteins, are biochemical compounds composed of carbon, nitrogen ... time. ' ' Then, at the end of his brief essay and almost in passing, Urey suggested- "It seems likely that interesting studies could be made by biologists and palaeontologists in regard to the selection of survivors of such catastrophes." That Urey failed to acknowledge either Worlds in Collision or Earth in Upheaval is more than disingenuous ...
48. Science Frontiers 1977-1978 [Journals] [Catastrophist Geology]
... J.; "Radiohalos in Coalified Wood: New Evidence for a Young Earth", Creation Research Society Quarterly, 14:101-102, 1977). HOW REAL ARE BIOLOGICAL EXTINCTIONS IN THE FOSSIL RECORD? Much has been made by catastrophists of the apparent wholesale extinctions of many forms of life from one geological period to another. Some uniformitarians ... INSECTS AND THEIR WINGS The earliest fossil insect is a wingless springtail found in Scotland's Devonian cherts, which conventional dating schemes tell us are about 350 million years old. Some biologists doubt that springtails should be classified as true insects. In any event, these ancient springtails are considered too specialized to be the ancestors of modern winged insects. The ...
49. Genesis and Extinction [Books] [de Grazia books]
... , as with the crash of a large body into the Earth. Such is quantavolution. It appears to be easier to discover death than new life. The literature on biological extinctions is getting heavier all the time, but little is forthcoming on genesis. We wonder why. Could it be a taboo against one kind of creation? Perhaps ... of a species in "natural selection," then the human and many another advanced' species should be regarded as handicapped in the struggle to survive and adapt. The biologist will probably agree with this and go in search of other advantages afforded these handicapped species in natural selection. When his search fails, he must grant that biology has ...
50. The Center Holds [Journals] [Pensee]
... " not to mention "Ice Ages"-these and many other terms will be useful to a revised geology only if their present associations are purged away. PALEONTOLOGY AND BIOLOGY Inseparable from the geological record is the paleontological and biological. This touches a part of Velikovsky's work which can legitimately be called a theory- that of catastrophic mutation. The ... of inducing mutation might be sophisticated through experiments. From the point of view of historical reconstruction, however, knowledge thus gained will be invaluable. Like the geologist, the biologist will have to face more seriously the fact that between strata many new species appear abruptly. His task is to devise laws of mutation refined enough to explain how a ...
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