Sentences with phrase «human populations because»

Thus rabies does not persist in human populations because people do not bite each other even when they are infected and, in practice, in Europe, people catch the virus mainly from foxes, although contact with them is rare.

Not exact matches

This team also discovered 3,200 genes that had fewer loss - of - function or missense mutations than would be expected suggesting that these are likely disease - causing variants that are rare or absent in the population because of their detrimental effect on human health.

Theists are afraid because they've gone from 99.9 % of human population to 98 % of human population?

For example, in addition to having higher levels of genetic diversity, populations in Africa tend to have lower amounts of linkage disequilibrium than do populations outside Africa, partly because of the larger size of human populations in Africa over the course of human history and partly because the number of modern humans who left Africa to colonize the rest of the world appears to have been relatively low (Gabriel et al. 2002).

Gods will is for us humans today to evolved to a level of conciousness that will prepare us for the challenges of our future survival, Scientists now predicts of hardships in the future due to over population and changes to the natural environment.and that is happening now with activists through out the world are reminding us of protecting nature.That is why we need a phsychological revolution to hasten the evolution of consciousness that will address the problems.Ideological and philosophical enlightenment had the past great minds to develop ideas and belief because God sent them to reality in their times.Abraham, Jesus, Mohammad, Buddha, and many other religious leaders to teach humanity the doctrines that God willed to be appropriate and applicable in those periods of their existence, Also great philosophers in another dimension of social involvement were born to interprete and connect philosophically as the second element of our conscience, Kant, Marx and countless of them also were born.To complete the triangular structure or dimension of our conscience is knowledge.

Though the implications of population change are profound — no less so because it involves the generation and termination of human life — it is a form of change that seems slow by comparison with many others.

Whether or not you removed all the gays from a population, new gay people would be continue to born in the original population because it is (clearly) a natural variant in human sexuality.

Some futurists envision among alternative prospects a world devastated by thermo - nuclear war, a vastly overcrowded, hungry population existing in misery, and a human race scratching in the earth with crude instruments because the raw materials necessary for an industrial technology have been exhausted beyond replacement.

More fundamental are problems which human beings have always faced when trying to shape their future — only now these problems bode incalculable harm because of the growth in population, and the growth in power of technology.

Explaining the rationale for the implementation of policies such as Free Senior High School Education and the restoration of Teacher and Nursing Training allowances despite enormous fiscal challenges, Vice President Bawumia said any nation that seeks to achieve holistic development must necessarily invest in its human capital, «and the President, Nana Addo Dankwa Akufo - Addo, is very committed to the education of every young person in Ghana, because an educated population is a prerequisite for growth.»

I think it continues to be a great challenge for Florida, because Florida has nothing in its loss or zoning or planning mechanisms that call for the state to limit the human population load in South Florida.

If we can preserve those areas we have got a triple bottom line, because it's going to be good for humans by stabilizing the climate, it's going to be good for the wildlife because we are protecting their habitat and it's going to be good for economic growth in the long - term because it's going to be sustaining human populations locally.

The Neandertal species did not go extinct, because it was never a separate species; instead population pockets of Neandertals died out around 30,000 years ago, whereas other Neandertal populations survived through interbreeding with their modern human brothers and sisters, who live on to this day.

And we think that one possible explanation for this could be that the collection of the feces and rubbish from towns under Roman law was then taken out to fertilize the crops, which gave you more plants, but unfortunately resulted in recontamination of the population, because the human feces then got onto the plants that were then eaten again.

Today's frogs, comprising more than 6,700 known species, as well as many other animal and plant species are under severe stress around the world because of habitat destruction, human population explosion and climate change, possibly heralding a new period of mass extinction.

Urbanisation is good for sustainability, because it reduces population growth and concentrates the overall human impact on the land in a smaller area.

The greater prairie chicken was once abundant across the central Plains, but populations have declined because of habitat loss and human development.

I mean, not every zebra of course have, [having] seen many lions eating zebras — but enough zebras do survive, so that their population continues on and that's pretty much the same down with human beings there, though of course in recent years it has gotten a little more challenging because we've become much more cunning and technologically empowered predators than we were before.

in the May issue claims that biologists say the concept of race is biologically meaningless, presumably because «any large human population has about 85 percent as much genetic variation as the species as a whole.»

Variation in pigmentation among human populations may reflect local adaptation to regional light environments, because dark skin is more photoprotective, whereas pale skin aids the production of vitamin D. Although genes associated with skin pigmentation have been identified in European populations, little is known about the genetic basis of skin pigmentation in Africans.

«These results are especially exciting because they show that we can take findings in the mouse and possibly apply them at the human patient population,» said Koenig.

Because of the human population, there had been overfishing, and we were able to catch very little.

The scientists estimate that these gene variations were able to persist in Neanderthals because Neanderthals had a much smaller population size than humans.

As the human population climbs, these cumulative changes will ultimately affect our economies and our well - being, because natural ecosystems perform — free of charge — many functions which we take for granted, such as purification of our wastes, production of harvestable resources, regulation of our climate, and restoration of the oxygen that we breathe.»

Researchers studied the Cayman reefs, which are 80 miles south of Cuba and surrounded by deep ocean water, in part because of their remoteness and negligible impact from a small nearby human population, Frazer said.

The Human Genome Diversity Project will never «resolve for us the nature of the large - scale relationships among populations», Marks argues, simply because the genetic diversity it documents springs largely from the messy and convoluted histories of continuously intermingling populations.

He found higher rates of nest predation in small woodlots near human communities because these areas had higher populations of raccoons (Procyon lotor) and squirrels (Sciurus spp.) and few, if any, large predators, such as cougars and bobcats (Lynx rufus).

Blue eyes have their hue because of a single genetic mutation that occurred fewer than 10,000 years ago in one individual and swept rapidly through the European population, according to a study published in the journal Human Genetics in January.

The impact on wild populations could be profound, they say, and because the processes of reproductive development are remarkably well conserved among mammals, these effects are very likely to be occurring among other mammalian species, including humans.

Then again, modern humans may have formed more widespread alliances merely because their population density was higher.

«We initiated the Great Ape Aging Project 20 years ago because we saw an aging chimpanzee population under human care that would need geriatric attention for disorders similar to those affecting aging humans,» said Joseph Erwin, Ph.D., research professor of anthropology at the George Washington University.

The adult populations of 10 species, including the spotted towhee (Pipilo maculatus) and song sparrow (Melospiza melodia), were doing fine in these habitats, perhaps because they have more food resources thanks to human - provided bird feeders.

Without ship strikes as a big factor holding the population back — and no other readily apparent human - caused reason (although noise, chemical pollution and interactions with fisheries may impact them)-- it is even more likely that the population is growing more slowly because whale numbers are reaching the habitat limit, something called the carrying capacity.

If the Neanderthals didn't lose out because of their inferior social skills, maybe they interbred with modern humans and simply disappeared into the larger population.

The site was of particular interest to population geneticist Andrea Manica of the University of Cambridge in the United Kingdom because the skeletons of five humans were found with pottery, harpoons, and the remnants of nets and mats woven from twisted blades of wild sedge grass — which some (but not all) researchers consider a rudimentary form of early agriculture.

Co-author Heidi Parker, a geneticist at NHGRI, says that because humans initially bred dogs for specific traits — say, smaller body size or calm temperament — selection created a population «bottleneck» that narrowed the genetic variation in offspring, leaving them with just a few specific clusters of variable genetic regions.

«Our findings also have important implications for mitochondrial diseases in humans, because this research significantly advances our understanding of how mitochondrial DNA mutations affect individuals and populations, and provides a potential mechanism to explain how different genetic variants may affect health,» Dr Rollins said.

«For instance, there are huge conflict areas in sub-Saharan Africa, because it has vital wildlife habitats but a very rapidly growing human population that will need more food and more roads.»

The starling population in Britain has dropped by half in the last four decades, Buchanan says, mostly because humans have been encroaching on their habitat — but perhaps also because pollutants are creating a siren song that has bewitched the females, luring them to reproduce with more musical, but less healthy, mates.

This is a shame, because stress and suffering in individual wild animals due to the encroachment of humans is contributing to the demise of whole populations.

* Because modern humans are believed to have originated in Africa, if Neandertals diverged from modern humans before present - day populations began to differentiate, one would expect Neandertal sequences to match sequences from non-Africans and Africans to the same extent.

Genetic analysis of modern humans is difficult, in part because the island populations were decimated by European diseases at the end of the 19th century.

«This is exciting because we now have a proven resource that could finally bring definitive answers to fundamental questions about the early movements and conditions of human populations — and new information about the importance of vitamin D for modern populations,» says McMaster anthropologist Megan Brickley, lead author of the paper and Canada Research Chair in the Bioarchaeology of Human Dishuman populations — and new information about the importance of vitamin D for modern populations,» says McMaster anthropologist Megan Brickley, lead author of the paper and Canada Research Chair in the Bioarchaeology of Human DisHuman Disease.

The team speculates that detrimental mutations have survived in humans and chimps because these species have had much smaller breeding populations than rodents throughout evolution.

* Correction, 22 March, 4:42 p.m.: This story has been corrected to remove any implication that because the San's ancestors branched off early from other human populations, living San are unusually closely related to ancestral humans.

«Because the tumors develop spontaneously, there is heterogeneity in that tumor population, as a human being would have.

Otherwise, a population of snow leopards might not survive because there's not enough prey, or they may start eating more domestic livestock, which can cause problems with local human populations.

The Teop people were selected to test Grimalda's theories on human cooperation for the small size of their communities (populations of around 50 inhabitants) and low levels of social complexity, though also because they present very different characteristics to those found in Western societies: they are horticulturists and gatherers; they use rudimentary tools to grow their food; they have no mechanised industry; and retribution for manual labour is infrequent.

The findings, and the techniques used to document them, are important to archaeological research in a broader sense because they lend further support to the idea that fluctuations in ancient mouse populations can be used as a proxy for tracking ancient shifts in human mobility, lifestyle and food domestication.

Alu - insertion polymorphisms are a boon for the study of human population genetics and primate comparative genomics because they are neutral genetic markers of identical descent with known ancestral states.