Darwin`s legacy: the forms, function and sexual diversity of flowers
... From his work on orchids Darwin obtained considerable evidence that many aspects of floral form involved adaptations promoting cross-pollination. He did not simply accept that outcrossing created the variation on which natural selection acts. Instead in The effects of cross and self fertilisation in ...
... From his work on orchids Darwin obtained considerable evidence that many aspects of floral form involved adaptations promoting cross-pollination. He did not simply accept that outcrossing created the variation on which natural selection acts. Instead in The effects of cross and self fertilisation in ...
Pre´cis of Evolution in Four Dimensions
... One thing that most mid- and late-20th century evolutionists were unwilling to incorporate into their theory was the possibility that the generation of new variations might be influenced by environmental conditions, and, hence, that not all inherited variation is “random” in origin. During the first ...
... One thing that most mid- and late-20th century evolutionists were unwilling to incorporate into their theory was the possibility that the generation of new variations might be influenced by environmental conditions, and, hence, that not all inherited variation is “random” in origin. During the first ...
Darwin`s Diagram of Divergence of Taxa as a Causal Model for the
... “theory of descent with modification through natural selection” (p. 459), which implies that his was a unified theory that combined common descent and natural selection. This idea is consistent with one of the passages in which Darwin describes the two great laws of nature, Unity of Type and the Con ...
... “theory of descent with modification through natural selection” (p. 459), which implies that his was a unified theory that combined common descent and natural selection. This idea is consistent with one of the passages in which Darwin describes the two great laws of nature, Unity of Type and the Con ...
Evolution
... • The mechanisms he proposed are unsupported by evidence Bonsai trees are "trained" to be dwarf, a seen will produce a normal sized tree ...
... • The mechanisms he proposed are unsupported by evidence Bonsai trees are "trained" to be dwarf, a seen will produce a normal sized tree ...
Chapter 22 Darwin
... 1795 Hutton proposes his theory of gradualism. 1798 Malthus publishes “Essay on the Principle of Population.” 1809 Lamarck publishes his hypothesis of evolution. 1830 Lyell publishes Principles of Geology. 1831–1836 Darwin travels around the world on HMS Beagle. 1837 Darwin begins his notebooks. 184 ...
... 1795 Hutton proposes his theory of gradualism. 1798 Malthus publishes “Essay on the Principle of Population.” 1809 Lamarck publishes his hypothesis of evolution. 1830 Lyell publishes Principles of Geology. 1831–1836 Darwin travels around the world on HMS Beagle. 1837 Darwin begins his notebooks. 184 ...
Fulltext PDF - Indian Academy of Sciences
... The transition from single cells to multicellularity is but one example of a more general class of phenomena in which autonomously replicating lower level entities are transformed by natural selection to become ‘parts’ of new higher level structures (Bonner 1974; Buss 1987). Together such events hav ...
... The transition from single cells to multicellularity is but one example of a more general class of phenomena in which autonomously replicating lower level entities are transformed by natural selection to become ‘parts’ of new higher level structures (Bonner 1974; Buss 1987). Together such events hav ...
The Kin Composition of Social Groups: Trading Group
... individuals leave the global pool in order and visit most recently founded groups first. Because newly dispersed relatives occupy recently formed groups, this creates a linearly viscous population structure that maximizes encounters between relatives and, in the sibs only and at least cousins models ...
... individuals leave the global pool in order and visit most recently founded groups first. Because newly dispersed relatives occupy recently formed groups, this creates a linearly viscous population structure that maximizes encounters between relatives and, in the sibs only and at least cousins models ...
Cladistic Parsimony, Historical Linguistics, and Cultural
... In addition to the theory of natural selection, the other great triumph of Darwin’s On the Origin of Species is the advancement and defense of the theory of common ancestry. This is the idea that any two organisms, including those that belong to different species, will have, if we look far back enou ...
... In addition to the theory of natural selection, the other great triumph of Darwin’s On the Origin of Species is the advancement and defense of the theory of common ancestry. This is the idea that any two organisms, including those that belong to different species, will have, if we look far back enou ...
PDF sample
... natural selection. Why did Darwin put selection first and foremost in the Origin and allow his views about common ancestry to emerge only gradually and as a secondary theme? This is a question about Darwin's rhetoric— the strategy he used to lay out his argument. The question becomes pressing when w ...
... natural selection. Why did Darwin put selection first and foremost in the Origin and allow his views about common ancestry to emerge only gradually and as a secondary theme? This is a question about Darwin's rhetoric— the strategy he used to lay out his argument. The question becomes pressing when w ...
PowerPoint
... sensibilities: a fully-evolved parasite would not harm the host it needs for its survival, proliferation, and transmission ...
... sensibilities: a fully-evolved parasite would not harm the host it needs for its survival, proliferation, and transmission ...
Fission and fusion of Darwin`s finches populations
... This study addresses the causes and evolutionary consequences of introgressive hybridization in the sympatric species of Darwin’s ground finches (Geospiza) on the small island of Daphne Major in the Galápagos archipelago. Hybridization occurs rarely (less than 2% of breeding pairs) but persistently ...
... This study addresses the causes and evolutionary consequences of introgressive hybridization in the sympatric species of Darwin’s ground finches (Geospiza) on the small island of Daphne Major in the Galápagos archipelago. Hybridization occurs rarely (less than 2% of breeding pairs) but persistently ...
Fission and fusion of Darwin`s finches populations
... This study addresses the causes and evolutionary consequences of introgressive hybridization in the sympatric species of Darwin’s ground finches (Geospiza) on the small island of Daphne Major in the Galápagos archipelago. Hybridization occurs rarely (less than 2% of breeding pairs) but persistently ...
... This study addresses the causes and evolutionary consequences of introgressive hybridization in the sympatric species of Darwin’s ground finches (Geospiza) on the small island of Daphne Major in the Galápagos archipelago. Hybridization occurs rarely (less than 2% of breeding pairs) but persistently ...
On the Evolution of Premating Isolation after a Founder Event
... a fixed have the same form, with index 2 taking the place of index 1. (A general formula for arbitrary n is given in the appendix.) Summarizing, with n ⫽ 1, a rare allele will decline in frequency if the probability of matings between common homozygotes is higher than the average of the probabilitie ...
... a fixed have the same form, with index 2 taking the place of index 1. (A general formula for arbitrary n is given in the appendix.) Summarizing, with n ⫽ 1, a rare allele will decline in frequency if the probability of matings between common homozygotes is higher than the average of the probabilitie ...
The Evolution of Aging Theories: Why Modern
... below). However, very extensive discoveries (some rather recent) concerning the nature of biological inheritance (central to any evolutionary mechanics theory) have exposed many issues with Darwinian mechanics and suggested multiple ways [8] in which a population benefit could indeed trade-off again ...
... below). However, very extensive discoveries (some rather recent) concerning the nature of biological inheritance (central to any evolutionary mechanics theory) have exposed many issues with Darwinian mechanics and suggested multiple ways [8] in which a population benefit could indeed trade-off again ...
Chapters 22-23 Evolution - Seattle Central College
... Individuals have different fitness. Fitness is the ability to survive and reproduce offspring ...
... Individuals have different fitness. Fitness is the ability to survive and reproduce offspring ...
- Megan Woolfit
... rate of morphological change and increased diversification rate. The body size trend in molecular evolution rate in vertebrates (Martin and Palumbi, 1993; Mooers and Harvey, 1994; Bromham et al., 1996) has prompted the suggestion that the presumed small body size of stem lineages of major radiations ...
... rate of morphological change and increased diversification rate. The body size trend in molecular evolution rate in vertebrates (Martin and Palumbi, 1993; Mooers and Harvey, 1994; Bromham et al., 1996) has prompted the suggestion that the presumed small body size of stem lineages of major radiations ...
Darwinism and Whitman`s Poetic Program
... postulates of Darwin's theory of development, but he does not so evidently express the fourth assumption - natural selection - which states that nature supplies an abundance of variety and those organisms most fit for their environment will survive and reproduce. The first of the two steps of "natur ...
... postulates of Darwin's theory of development, but he does not so evidently express the fourth assumption - natural selection - which states that nature supplies an abundance of variety and those organisms most fit for their environment will survive and reproduce. The first of the two steps of "natur ...
Aesthetic evolution by mate choice: Darwin`s really dangerous idea
... interesting, because it affords good evidence that the most refined beauty may serve as a sexual charm, and for no other purpose. [11, p. 516] ...
... interesting, because it affords good evidence that the most refined beauty may serve as a sexual charm, and for no other purpose. [11, p. 516] ...
Aesthetic evolution by mate choice: Darwin`s really dangerous idea
... should be preferred because it has a purer, more direct Darwinian heritage. However, the most recent and relevant scientific antecedents to the perspective I am proposing come from Darwin’s Descent of man; so the historical analysis I present here is specifically relevant to contemporary scientific ...
... should be preferred because it has a purer, more direct Darwinian heritage. However, the most recent and relevant scientific antecedents to the perspective I am proposing come from Darwin’s Descent of man; so the historical analysis I present here is specifically relevant to contemporary scientific ...
Neutral Evolution and Aesthetics
... advantageous ways not predicted by those laws. These two aspects, emergent lawfulness and ability to transcend laws, makes natural systems seem telic, that is, progressive or creatively organized toward goals. This view of telic behavior can also be used to describe artistic behavior. To some degree ...
... advantageous ways not predicted by those laws. These two aspects, emergent lawfulness and ability to transcend laws, makes natural systems seem telic, that is, progressive or creatively organized toward goals. This view of telic behavior can also be used to describe artistic behavior. To some degree ...
On the Origin of Cats and Carnivores
... Placental cats are native to all settled continents with the exception of Australia, which is home to unique marsupial ‘cats’ that are deceptively, yet only superficially similar to the placental forms. On the North American continent are found the puma or cougar, commonly called mountain lions, and ...
... Placental cats are native to all settled continents with the exception of Australia, which is home to unique marsupial ‘cats’ that are deceptively, yet only superficially similar to the placental forms. On the North American continent are found the puma or cougar, commonly called mountain lions, and ...
Human Locomotion and Heat Loss: An Evolutionary Perspective
... dispersed all over the globe, further selection occurred to help different populations adapt to a wide range of climatic conditions, but all human populations are variants of a basic adaptive pattern for long-term aerobic exertion in hot habitats. I first summarize the evidence for the evolution of ...
... dispersed all over the globe, further selection occurred to help different populations adapt to a wide range of climatic conditions, but all human populations are variants of a basic adaptive pattern for long-term aerobic exertion in hot habitats. I first summarize the evidence for the evolution of ...
The Evolutionary Emergence of Vertebrates From Among Their
... scenario, this ancestor must have been an amphioxus-like organism because segmented muscles and paired pharyngeal gill slits are characters general to deuterostomes, and a notochord is a character general to chordates (i.e., because they all share these characters, the most parsimonious interpretati ...
... scenario, this ancestor must have been an amphioxus-like organism because segmented muscles and paired pharyngeal gill slits are characters general to deuterostomes, and a notochord is a character general to chordates (i.e., because they all share these characters, the most parsimonious interpretati ...
Natural Selection
... Key Stage 3 gives learners a great platform of scientific knowledge that they can build on in Key Stage 4. At Key Stage 3, learners will have studied many of the fundamental aspects of natural selection. These include how individuals in a population are different and how living organisms show adapta ...
... Key Stage 3 gives learners a great platform of scientific knowledge that they can build on in Key Stage 4. At Key Stage 3, learners will have studied many of the fundamental aspects of natural selection. These include how individuals in a population are different and how living organisms show adapta ...
REVIEW Selectionism and Neutralism in Molecular Evolution
... Department of Biology, Institute of Molecular Evolutionary Genetics, 328 Mueller Laboratory, Pennsylvania State University Charles Darwin proposed that evolution occurs primarily by natural selection, but this view has been controversial from the beginning. Two of the major opposing views have been ...
... Department of Biology, Institute of Molecular Evolutionary Genetics, 328 Mueller Laboratory, Pennsylvania State University Charles Darwin proposed that evolution occurs primarily by natural selection, but this view has been controversial from the beginning. Two of the major opposing views have been ...