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4 results for "sexual dimorphism"
The Evolutionary Theory of Sex By Sergey Geodakyan
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What do we need two sexes for? What is the evolutionary significance of this phenomenon? What is the nature of the differences between the sexes? What is sexual dimorphism and what does it mean? How... More > is it connected to other life phenomena? New evolutionary theory of sex differentiation developed by Dr. Biol. Sci. Vigen Geodakian has the answers. It provides a scientific justification for the existence of men and women, and the evolutionary roles that they play in family and society. The book is intended to scientists, teachers, students, and other professionals working in the fields of biology, medicine, psychology, sociology, anthropology, and many other related branches of science.< Less
The Descent of Man and Selection in Relation to Sex, Vol. I By Charles Darwin
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Hint: You can preview this book by clicking on "Preview" which is located under the cover of this book. About the author: Charles Robert Darwin, FRS FRGS FLS FZS... More > (/ˈdɑːrwɪn/; 12 February 1809 – 19 April 1882) was an English naturalist and geologist, best known for his contributions to evolutionary theory. [I] He established that all species of life have descended over time from common ancestors, and in a joint publication with Alfred Russel Wallace introduced his scientific theory that this branching pattern of evolution resulted from a process that he called natural selection, in which the struggle for existence has a similar effect to the artificial selection involved in selective breeding.Darwin published his theory of evolution with compelling evidence in his 1859 book On the Origin of Species, overcoming scientific rejection of earlier concepts of transmutation of species. Excerpt from: https://en.wikipedia.org/wiki/Charles_Darwin< Less
The North American Whistling-Ducks, Pochards, and Stifftails By Paul Johnsgard
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The 12 species described in this volume are not closely related, but they provide an instructive example of adaptive evolutionary radiation within the much larger waterfowl lineage as to their... More > divergent morphologies, life histories, and social behaviors. The whistling-ducks (Dendrocygna), with three known North American species, are notable for their permanent pair-bonds, extended biparental family care, and strong social cohesion. In contrast, males of the five typical pochards (Aythya) maintain monogamous pair-bonds only long enough to assure that the female’s eggs are fertilized. The extreme of this behavior exists among the stifftails (Oxyura). Such diverse reproductive strategies have exerted powerful evolutionary influences on interspecies variations in sexual dimorphism, sexual behavior, anatomy, ecology, and other traits. This volume includes more than 63,000 words, plus some 200 maps, photos, drawings, and sketches, and nearly 650 literature citations.< Less
Эволюционная теория пола By Сергей Геодакян
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What do we need two sexes for? What is the evolutionary significance of this phenomenon? What is the nature of the differences between the sexes? What is sexual dimorphism and what does it mean? How... More > is it connected to other life phenomena? The new evolutionary theory of sex differentiation developed by Dr. Biol. Sci. Vigen Geodakian has the answers. It provides a scientific justification for the existence of men and women, and the evolutionary roles that they play in family and society. The book is intended to scientists, teachers, students, and other professionals working in the fields of biology, medicine, psychology, sociology, anthropology, and many other related branches of science.< Less