Sentences with phrase «more by natural selection»

Not exact matches

In fact, Darwinian natural selection is defined as a process by which superior varieties exterminate their inferiors, whether by attacking them directly or by competing more effectively for limited resources.

By itself, however, natural selection provides for no evolutionary advance, for it introduces no novelty, and hence no possibility of anything more than that which already has been.

3At present, for example, the well - entrenched neo-Darwinian hypothesis of «gradualism» (biological evolution occurs slowly, and more or less continuously as the constant interplay of random variations and natural selection over vast periods of time) is confronted with a somewhat more radical and neo-Lamarckian theory of «punctuated equilibrium» favored by Harvard biologists Stephen Jay Gould and Peter Williamson, collaborated by fossil discoveries of paleontologist and cultural anthropologist Richard Leakey in Africa.

Natural selection, an essential part of the process by which organisms evolve into richer and more complex forms, inevitably involves a great deal of suffering, death, and general failure of organisms to flourish.

Their argument has been around for four decades, but nothing in the letter addresses the challenges we raised: that the mathematical ground of inclusive fitness theory is unsound and that, when you compare competing hypotheses, outcomes are much more directly and convincingly explained by mainstream natural selection.

Müllerian mimicry is a classic example of evolution by natural selection: When two or more foul - tasting species share the same habitat, they tend to warn potential predators using the same colors.

No one knows for sure why they began to look more human, but unlike the bodies of other species, which are shaped by natural selection, ours may have been sculpted by our own ingenuity.

More recently, a report by Kevin N. Laland of the University of St. Andrews in Scotland and his colleagues in Nature Reviews Genetics, building on an earlier proposal by Robert Boyd of the University of California, Los Angeles, and Peter J. Richerson of U.C. Davis, argued that human culture, defined as any learned behavior, including technology, has been the dominant natural selection force on modern humans.

Natural selection is the process by which certain traits in a population become more common because individuals with those traits survive and reproduce.

The fastest and most famous case of evolution by natural selection is the case of the British peppered moths: In the 19th century, as mills and factories began to darken the air with soot, a rare all - black mutant quickly became more common in Britain than the normal white moth with black spots because it was less conspicuous to predators.

Our results show that male competition is a key driver of speciation — by a factor that is five times greater than results on which other, more - traditional theories of natural selection causing speciation are based.»

By favoring more tolerant, less antagonistic individuals, natural selection reshaped both our behavior and our appearance.

Researchers Michael Tobler, associate professor of biology, and Zach Culumber, former university postdoctoral research associate and current postdoctoral researcher at Florida State University, studied 112 species of live - bearing fish and found that males and females evolve differently: Female evolution is influenced more strongly by natural selection and the environment, while male evolution is influenced more strongly by sexual selection, which involves characteristics that females find desirable or that make them superior competitors for females.

At one point, he explained that so many more babies survive childbirth now that natural selection, as proposed by Charles Darwin, can not act on humans to favor infants with traits that are beneficial today or to weed out those with adaptations that impair survival.

Human cognition is more than a legacy of our Paleolithic past Evolutionary psychology has typically tried to identify the piece parts of human cognition shaped by the rigors of natural selection.

Even more interesting is that natural selection by these parasitic wasps on gall form is ongoing and still very strong, providing both a window into past processes of diversification and a divination of future adaptive diversification in this gall midge lineage.

By scanning the entire human genome in search of genetic variations that may signal recent evolution, University of Chicago researchers found more than 700 genetic variants that may be targets of recent natural positive selection during the past 10,000 years of human evolution.

Although this natural gene drive is unpredictable and scattershot, Burt showed that certain tricks of molecular biology could achieve the same results: causing a gene to be inherited by many more organisms through many generations than standard genetics and natural selection allow.

Yet each one tells a different story: (a), how novel - to - dbSNP variants were rare; (b), how nonsynonymous variant frequencies are shifted to lower values relative to those of synonymous variants, (c), how this shift in allele frequencies is more pronounced for damaging nsSNPs, consistent with natural selection, and (d), how the sizes of observed indels are enriched for non-frameshift events divisible by 3.

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In reality, hunter - gatherers were unbelievably skilled (a point also made by Jared Diamond in his classic Guns, Germs and Steel, in which, if I recollect correctly, he makes a compelling case that as a result of natural selection and their environment, the indigenous people of Papua New Guinea are, on average, more intelligent than so called «first world *» inhabitants).

There is something even more peculiar about our species than all these things, and that is this: we are the only species on the planet that can not be fully explained by Charles Darwin's otherwise faultless theory of evolution by natural selection.

The theory of memetics shows how creating a mode of natural selection for memes in the sea of uncontrolled digital information via Arsenal Gear would allow the Patriots to shape public discourse by easily replacing radical or opposing ideas with those that the group finds more convenient for maintaining their power.

Our artist selection wan't at all determined beforehand by principal — but organically worked out that way as part of a natural but still complex artist selection & review process — although I believe it would have made it all far more radical to Alloway if it was first determined that way by principal.

The Earth revolves around the Sun; organisms, including the Great Apes, evolve by natural selection; the Earth is billions of years old; the tectonic plates of the Earth are in constant motion; humans adding CO2 to the atmosphere now warms the climate more quickly than natural cycles do.