How to use natural selection in a sentence

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Sentence Examples In the first case, i.e. a new anagenetic evolutionary trend, a complete reversal of the direction of natural selection should be assumed. The real analogy behind natural selection is the work of the natural historian. Evolution cannot be right because scientists do not agree on the mechanism for natural selection and ancestry of various species. Drug resistance arises by natural selection, mutant strains being selected when the virus replicates in sub-limiting drug concentrations. In a world where disadvantages are usually weeded out by natural selection, how have left-handers survived? In both cases, the ultimate goal is to understand how suites of traits and trade-offs between competing functions respond to natural selection. As gene frequencies change, natural selection acts on the outcome, the expression of those genes. As a prize example of creating new species by natural selection, these finches leave very much to be desired. The simplest case involving natural selection is genic selection in the absence of extinction and recolonization. For us as scientists, natural selection and Darwinism are essentially synonymous. The second of the central tenets of classical Darwinism is the unfettered efficacy of natural selection. One consequence of Darwinian evolution by natural selection is that as the world changes, what lives and what dies can change as well. However, Barbara is absolutely correct in summarizing the natural selection theories of Charles Darwin as inarguable. They were an old race, many millennia having given natural selection time to run its course. This theory suggested that polar marine invertebrates lack sufficient fish predation to drive natural selection for chemical means of protection. First, he wonders how natural selection connects up with mental development. It is conjectured that natural selection tuned the average connectivity in such a way that the network reaches a sparse graph of connections. He used the tenets of population biology, ordered by natural selection and biological fitness, to look at societal comportment. This would add greatly to our knowledge of natural selection and co-evolution in plant-pathogen populations. Although these two species hybridize freely, subsequent generations are subject to intense natural selection. Show More Sentences He has merged Chomskyan ideas about an innate language faculty with the Darwinian theory of adaptation and natural selection. As long as the belief in progress reigned supreme people could not see this fallacy in the theory of evolution by natural selection. Any approach to human psychology which recognizes that the brain is the product of natural selection lies within the pale. Nevertheless, studying the extreme case of vestigial teeth clearly confirms that natural selection affects patterns of variability. He begins the review in a fantasy world in which Darwin did not originate the concept of natural selection. There was otherwise only weak evidence that natural selection might be operative at the HLA loci, and this effect appeared localized. If natural selection is the buzz phrase of Darwinian theory, then specified complexity is the buzz phrase of the intelligent design movement. Darwin found the perfect vehicle for his purpose in the supposed evolution of species by chance variation and natural selection. Mutation is the primary source of genetic variation upon which natural selection can act. Pre-biotic natural selection and chemical necessity cannot, as a logical matter, explain the origin of biological information. There are many excellent popular science books on the subject of evolution and natural selection. In other words, Darwinian processes of natural selection are now at play in the science media. The researchers do not know why natural selection favored human ancestors who could run long distances. As in Darwin's theory of natural selection, a species must adjust to survive. So, in terms of Biology, natural selection is based on genetic information. These traits and differences are said to have evolved in our ancestors via natural selection. Charles Darwin's ideas on evolution through natural selection are the basis for these arguments. Studying the Galapagos islands helped to inspire Charles Darwin's theory of natural selection. In other words, these capacities are the outcome of evolution by natural selection. By a process of natural selection the better adapted individuals and species survived while the others died out. Show More Sentences They argue that advances in molecular biology suggest that natural selection is wrong. He says that adaptive fitness, produced by natural selection, is not necessarily related to survival value. The theory of evolution by natural selection is the unifying theory of biology. This type of altruism seems inconsistent with principles of natural selection. In fact, there is no real scientific evidence to refute natural selection as a valid theory. This helps the market to evolve to become smarter over time through natural selection. Second, mathematical geneticists showed that the gene frequency change by mutation is much smaller than the change by natural selection. Scientists came to understand how genes mutate, and how mutations helped make natural selection possible. Even in biology, apparent purpose is now thought to arise from the undirected mechanism of natural selection acting on random genetic mutations. The theory of natural selection thus postulates a causal relation wholly unappreciated by natural historians before Darwin. Evolutionary senescence theory argues that organisms senesce because the power of natural selection decreases with age. One way to find such genetic signatures is to search for genes that reveal signs of positive natural selection. Darwin discovered evolution through natural selection, but, a quiet man with a religious wife, he did not engage in the ensuing public debates. Both yield direct inferences about the process of evolution by natural selection. This correlation could be explained by a particular migration scheme from Europe to Brazil without the explicative need of natural selection. This sort of pain is just what we would expect from natural selection, which is a jerry-builder. In the mid-twentieth century, better methods and better models of natural selection drove the field of animal behavior back to ethology. The linkage between genes and behaviour is clear, but it did not evolve by natural selection. Since junk DNA does not code for proteins, mutations can accumulate within it without natural selection weeding them out. There is now no doubt that natural selection is a mechanism of evolutionary change. Show More Sentences But planes would still fly, and life still evolves through natural selection, common descent, and the known workings of genetics. Biologists were quick to seize upon this as the longed-for evidence of natural selection in action. Our data suggest that the performance paradigm can be expanded to reveal more of the physiological underpinning of natural selection in the wild. We are now told, with equal wonder and admiration, that natural selection is the agent of exquisite design. There is an important conceptual distinction between the evolutionary response to natural selection and phenotypic selection. The empirically observed mutations are thus neither favored nor disfavored by natural selection. Without presuming to answer the question, he demonstrated how natural selection works to refine instinct in such cases as slave-making ants or hive-making bees. Darwin was a British Scientist who developed the theory of evolution and natural selection. Under the ecological theory of adaptive radiation, adaptation and reproductive isolation are thought to evolve as a result of divergent natural selection. Unlinked genes may also be associated if biological processes, such as population differentiation, population admixture, and natural selection, occur in a population. Thus, natural selection should favor parasitoids that utilize as kairomones only the chemicals that uniquely and reliably identify potential hosts. Black holes could therefore be the vehicle for a kind of cosmic natural selection, in which universes are reproductively favoured if they make lots of black-hole offspring. Darwin, who viewed natural selection as a process producing slow anagenetic changes along lines of descent, thought that species were arbitrary slices. His observations of the many varieties of finch birds in the Galapagos Island led him to solidify his theory of natural selection. Emotions, designed by natural selection and controlled by the limbic system of the brain, motivate infants and children to protest sleep isolation from parents by crying. Our brains can foresee that if we let natural selection take its course then it could be disastrous in the long run. The Panglossian view of natural selection is an appealing idea to us as human beings, you argue, because brains have foresight. Perhaps the possibility should be considered that evolution selects for beings that imagine their own species exempt from natural selection and possible extinction. Consider Darwin's theory of evolution through natural selection. Most do believe that evolution works by natural selection on changes in organisms due to random changes in their DNA, and the evidence for this is overwhelming. Show More Sentences Thus, nothing in life or about the functioning of living organisms can be fully understood without an appreciation of evolution by natural selection. Few public figures who wish to be taken seriously in any scientific discipline are still trying to discount Darwin's theory of evolution and natural selection. As for the beautiful color of the giraffe indicating design and not natural selection, I would simply point out that beauty is in the eye of the beholder. Going back to the 19th century, scientists have proposed that sexual reproduction makes natural selection more effective because it increases genetic variation. Francis gives a similar explanation for the exceptional mimicry of mockingbirds, suggesting that mimicry itself was not favored by natural selection. We have taken the reigns of natural selection to become the chief agents of the evolutionary process. Surely there's not enough intra-species competition for natural selection. So genetic stock changes through natural selection rather than learning. You would expect natural selection to remove the unattractive variants. Even if not every mutation leads to a new evolutionary pathway, the flies are a vivid example of one way mutation can provide variation for natural selection to work on. The contrast is between a random sampling of gametes that leads to the fixation of selectively neutral alleles and natural selection favoring advantageous variations. Do plastic traits affect reproductive fitness, suggesting that they may be under natural selection depending on environmental conditions experienced by the plants? Darwin's theory of natural selection needs to be placed in the context of the history of intellectual thought preceding and contemporary with Darwin. The key to the mechanism of Darwinian evolution is natural selection. But they express scorn for the extreme Darwinians, those who treat Darwinism as a religion, or try to interpret human social life by genes or natural selection. Darwinists virtually never explain in any detail how natural selection would actually get from protein A to protein B after the gene for protein A duplicated. Peter and Rosemary Grant of Princeton have done some of the best work on natural selection in the wild, documenting its effect on Darwin's finches on the Galapagos island. And, to avoid competition, natural selection has made sure that, even within a guild there are tiny differences in the diets, habitats or behaviours of each member. In contrast, the drosophilas of Hawaii owe their oddity entirely to the whims of natural selection. In biology, Darwinism gained acceptance, promoting the concept of adaptation in the theory of natural selection. Show More Sentences Changes in gene frequency brought about by random genetic drift, gene flow, and natural selection lead to the evolution of populations. Diversity appears to increase continually in the absence of natural selection. Therefore, unlike other methods of controlling the fox population, it is argued that hunting with dogs resembles natural selection. These religious leaders were suspicious of Darwin's theory, and believed that natural selection needed to be supplemented by another process. Concepts and models used in evolutionary biology, such as natural selection, have many applications. Most prominent are the specific behavioural and physical adaptations that are the outcome of natural selection. He's worked on natural selection among cell lines in sea squirts, and he accepts the basic premise that evolution can occur at different levels. Others argued that the artificial selection of eugenics should amplify natural selection in eliminating weaklings from the Italian population. But with blending inheritance, genetic variance would be rapidly lost, making evolution by natural selection implausible. He wrote most of a second part, on natural selection, but it remained unpublished in his lifetime. This broad understanding of nature enables scientists to delineate specific forces which, together, comprise natural selection. The central concept of natural selection is the evolutionary fitness of an organism. While he was exploring the archipelago, he refined his thoughts about evolution and had his famous insight on natural selection. Several hands-on activities were also utilized to teach concepts like natural selection, cladograms, and phylogeny. Without the ability to recombine during meiosis, the Y chromosome is unable to expose individual alleles to natural selection. Mechanisms that can lead to changes in allele frequencies include natural selection, genetic drift, genetic hitchhiking, mutation and gene flow. The principal mechanism for evolution is natural selection among diverse populations. On orthogenesis and the impotence of natural selection in species-formation. This contrasts the traditional Darwinistic view that they are the result of natural selection in favour of adaptive mutations. The attendant consequences on viability and population levels fell within the sphere of natural selection. Show More Sentences Another factor that leads to the development of dimorphisms in species is natural selection. In Part Three, Shapiro directly takes on the Darwinian ideas of gradualism and natural selection. Charles Darwin was the first to describe the role of natural selection in speciation in his 1859 book The Origin of Species. Darwin argued that it was populations that evolved, not individuals, by natural selection from naturally occurring variation among individuals. Charles Darwin's 1859 book The Origin of Species explained how species could arise by natural selection. William Charles Wells, predecessor to Charles Darwin on the theory of natural selection was another schooled in Dumfries. Thus not all phenomena of evolution are explained by natural selection alone. The importance of natural selection as a cause of evolution was accepted into other branches of biology. The theory of natural selection may be so formulated that it is far from tautological. I still believe that natural selection works in this way as a research programme. My solution was that the doctrine of natural selection is a most successful metaphysical research programme. Darwin's theory of evolution by natural selection undermined religious certainty and the idea of human uniqueness. The formation of Botryllus multichimeras sets the 'group level' as the key level at which natural selection acts. Darwin's book was only partly written when, on 18 June 1858, he received a paper from Wallace describing natural selection. He later called his theory natural selection, an analogy with what he termed the artificial selection of selective breeding. The social implications of the theory of evolution by natural selection also became the source of continuing controversy. When such mutations result in a higher fitness, natural selection favours these phenotypes and the novel trait spreads in the population. Artificial selection is purposive where natural selection is not, though biologists often use teleological language to describe it. The scientists scanned the genomes of 89 East Asians, 60 Europeans, and 60 Africans to find DNA stretches recently affected by natural selection. We have a host of documented examples of natural selection operating in the wild with all the data an avid Herschelian could desire. Show More Sentences This gives the appearance of purpose, but in natural selection there is no intentional choice. The term natural selection is most often defined to operate on heritable traits, because these directly participate in evolution. This synthesis cemented natural selection as the foundation of evolutionary theory, where it remains today. For Darwin and his contemporaries, natural selection was in essence synonymous with evolution by natural selection. In 1859, Charles Darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. While genotypes can slowly change by random genetic drift, natural selection remains the primary explanation for adaptive evolution. In other words, natural selection is a key process in the evolution of a population. Naturalist Charles Darwin, authored On the Origin of Species and discovered the principle of evolution by natural selection. An organism is then atomized into 'traits' and these traits are explained as structures optimally designed by natural selection for their functions. Mutationism was opposed by many naturalists, particularly biometricians like Briton Karl Pearson who defended Darwinian natural selection as the major cause of evolution. He felt that it was important that evolution by natural selection be taught in schools and that it was regrettable that English schools had compulsory religious instruction. Patrick Matthew drew attention to his 1831 book which had a brief appendix suggesting a concept of natural selection leading to new species, but he had not developed the idea. Verschuuren claims to be a staunch defender of neo-Darwinism or synthetic evolutionary theory, the synthesis of Darwinian natural selection and Mendelian genetic inheritance. Some argue that natural selection during the Malthusian epoch selected beneficial traits to the growth process and brought about the Industrial Revolution. On this view, life may have come into existence when RNA chains first experienced the basic conditions, as conceived by Charles Darwin, for natural selection to operate. Spawning channels preserve the natural selection of natural streams, as there is no benefit, as in hatcheries, to use prophylactic chemicals to control diseases. The ability to avoid or recover from predation often makes the difference between life and death, and is therefore one of the strongest components of natural selection. By the end of the decade most scientists agreed that evolution occurred, but only a minority supported Darwin's view that the chief mechanism was natural selection. This way it looks as if the phenotype were changing guided by some invisible hand, while it is merely natural selection working in combination with the new behaviour. This teleonomy is the quality whereby the process of natural selection creates and preserves traits that are seemingly fitted for the functional roles they perform. Show More Sentences As they exploded across the landscape and invaded ever drier habitats, natural selection favored shorter, wider, more conductively efficient vessels. Pleiotrophy, natural selection and the evolution of senescence. The old argument from design in Nature, as given by Paley, which formerly seemed to me so conclusive, fails, now that the law of natural selection has been discovered. Evolution by means of natural selection is the process by which traits that enhance survival and reproduction become more common in successive generations of a population. In trying to explain experiments with bacteria which become adapted to, say, penicillin, it is quite clear that we are greatly helped by the theory of natural selection. Examples from Classical Literature Darwin was, therefore, of opinion that natural selection is able to bring about polytypic evolution. But Darwin's theory of the transformation of species by natural selection is as yet unverified. It has been shown that divergent or polytypic evolution on common areas is inexplicable by natural selection alone. It was Darwin who put the crown on the edifice by his theory of natural selection. The theory or principle of natural selection can also be applied to nations. His account is a mixture of Lamarckism with the added Darwinian factors of competition and natural selection. In a race of inferior animals, any maladjustment is quickly removed by natural selection. Therefore we may set it down as the uncompounded result of natural selection. It is easy to see how natural selection can bring about monotypic evolution, but how can it have effected polytypic evolution? It is evident, then, as Romanes claims, that natural selection alone tends to monotypic evolution. It is not, therefore, unpermissible to conceive a gradual increase in the faculty of memory by natural selection. To sum up the circumstances favourable and unfavourable to natural selection, as far as the extreme intricacy of the subject permits. I look about me as I ride and on every hand I see the merciless and infinite waste of natural selection. He said that what they are asking is whether the ability of an organism to evolve is a trait that natural selection can pick. This is why instinct, determined by natural selection, repels it. What is the theory of natural selection, and how did Darwin arrive at it? And this is really all that M. Flourens can make of natural selection. If art by artificial selection, why not Nature by natural selection? Had natural selection produced during the countless ages of Caspakian life a winged monstrosity that represented the earthly pinnacle of man's evolution? The expression of conditions of existence, so often insisted on by the illustrious Cuvier, is fully embraced by the principle of natural selection. Find more words! 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What is the opposite of natural selection? What is the plural of natural selection? Use our Sentence Generator Nearby Words natural satellite naturals natural rights natural right natural resources natural resource natural world nature Nature natured naturel nature lover