Sentences with phrase «in human lineage»

The prominent sagittal crest running along the midline at the top of the skull is the largest ever discovered in the human lineage.

Determining the answer could pinpoint when bigger brains emerged in the human lineage.

«The implication is that these cells were somehow lost in the lineage leading to the African great apes and recovered specifically in the human lineage.»

They focused their search on expression levels of two sets of genes, those that remained largely unchanged across all four species, suggesting that there was little room — or need — for improvement, and those that changed most dramatically, usually in the human lineage — an indication of powerful incentives to adapt to a changing environment.

Molecular and cellular reorganization of neural circuits in the human lineage.

Recent breakthroughs in evolutionary genomics show that a burst of gene duplications occurred in the human lineage during its separation from non-human primates approximately 6 million years ago (Bailey et al., 2002; Fortna et al., 2004; Marques - Bonet et al., 2009).

Every part of it cries out that it is the continuation of something very archaic in human lineage.

Su's team found that a gene called the PACAP precursor stayed substantially the same across eons, but then, sometime after humans and chimps diverged, it evolved at warp speed in the human lineage.

The chunks of older DNA stand out because they are unusually rich in mutations, which would have built up for hundreds of thousands of years in the genomes of Denisovans, but would not have been present in the human lineage.

Multiple lines of research point to the likelihood that brain reorganization, the use of tools and use of a dominant hand occurred early in the human lineage.

This is important because it provides the earliest archaeological evidence of this type of resource transport behavior in the human lineage.»

«I was expecting to find that a few genes would be evolving rapidly, while probably the overall distribution would be changing at about the same rate among all the primates, but instead we saw that the brain's gene evolution in the human lineage has actually slowed down,» Wu says.

Not exact matches

Then, given your clearly profound understanding of the relevant science, you can explain how humans came to possess a defunct gene for egg - yolk proteins in our placental mammal genomes and why the presence of this dead gene and the mutations rendering it defunct map to the lineages observable in the fossil record?

Marking the 75th anniversary of the infamous Buck v. Bell case endorsing forced sterilization, in which Oliver Wendell Holmes Jr. declared «three generations of imbeciles is enough,» the laboratory assures us that the new, more precise science of genetics means that «no human lineage is without hope.»

Because virtue ethicists tend to trace their lineage back to Aristotle, when they discuss the connection between ethics and metaphysics they also tend to do so in Aristotelian terms, specifically in terms of a natural teleology that tries to determine which functional properties are essential for a full human life.

Stem cells have also been identified in human milk, and have the potential to differentiate into mammary epithelial lineages under mammary differentiation conditions in vitro, as well as other cell types in corresponding microenvironments, including bone cells, brain cells, liver cells, pancreatic beta cells and heart cells.

It appears that many of the core features of human language have deep roots in the primate lineage.

«This may be the first example of human behaviour generating a new ecotype or lineage of an animal,» says Joe Tobias of the Edward Grey Institute at the Department of Zoology at the University of Oxford in the UK.

Research published in early 2004 shows that the viruses from all known human cases of the 2003 outbreak seem to descend from the same lineage.

«We have followed a less potent neutralizing lineage in this particular individual before, but now we have found a far more potent antibody and have been able to study its development over six years,» said first author Mattia Bonsignori, M.D., of the Duke Human Vaccine Institute.

Terry Harrison, a paleoanthropologist at New York University, questioned in Nature whether Ardi was even a member of the human lineage or just an ape «among the tangled branches» of a much larger bush.

A new study concludes that the art of conversation may have arisen early in human evolution, because it made it easier for our ancestors to teach each other how to make stone tools — a skill that was crucial for the spectacular success of our lineage.

The genetic data recovered by the research team, led by scientists from the Max Planck Institute for the Science of Human History and the University of Tübingen, provides a timeline for a proposed hominin migration out of Africa that occurred after the ancestors of Neanderthals arrived in Europe by a lineage more closely related to modern humans.

«In this study, I believe we may have found an individual from a lineage that broke off early in modern human evolution and remained geographically isolateIn this study, I believe we may have found an individual from a lineage that broke off early in modern human evolution and remained geographically isolatein modern human evolution and remained geographically isolated.

«This pattern in brown bears covers even larger geographic areas than analogous findings from humans, where the Y - chromosomal lineage of Genghis Khan, founder of the Mongol Empire, was spread across much of Asia,» said Tobias Bidon and Frank Hailer, lead authors of the study.

Inermorostrum evolved its unusual feeding style just 4 million years after the toothed whale lineage split from the branch of the family tree that includes the ancestors of today's baleen whales such as humpbacks, which filter their food through frayed sheets of keratin, the same material in human fingernails.

Horse breeding records are some of the most impressive efforts to chronicle animal lineages in human history, with some stretching back thousands of years.

Scientists had assumed that many genes present in humans and absent in worms and flies had evolved recently in our lineage, «but some of these genes have now been found in Aplysia, which means that they are actually quite primitive,» says neuroscientist Edgar Walters of the University of Texas Medical School at Houston.

«Learning when transposons first appeared may give us some insight into how they spread through the mammalian lineage and how they are expressed in humans,» Batzer says.

More recent fossil discoveries in the same region, including the iconic 3.7 million year old Laetoli footprints from Tanzania which show human - like feet and upright locomotion, have cemented the idea that hominins (early members of the human lineage) not only originated in Africa but remained isolated there for several million years before dispersing to Europe and Asia.

They also compared the human genomes with recently sequenced genomes of Neanderthals and Denisovans and found similar genetic variation, which indicates that the facial variation in modern humans must have originated prior to the split between these different lineages.

Our surveillance in Saudi Arabia in 2014 and 2015 showed that viruses of the MERS - CoV species and a human CoV 229E — related lineage co-circulated at high prevalence, with frequent co-infections in the upper respiratory tract of dromedary camels.

Several camel coronaviruses occur in the Middle East, and a recombinant lineage is linked to the recent human outbreaks of MERS.

Missing link: Nine skeletons found in northern Ethiopia dating to about 4.5 million years ago — less than 2 million years after the lineages of humans and apes split — have scientists wondering if the remains are related to humans.

To date, most studies have focused on the influenza A virus lineages because they are the more commonly circulating lineages in humans which have also caused occasional pandemics.

Two 9.7 - million - year - old fossil teeth from Germany probably did not come from a previously unknown European root of the human lineage, as heralded in headlines over the last few days.

Four influenza virus lineages co-circulate in the human population to cause seasonal epidemics.

But now, in a new plot twist in the unfolding mystery of how Neandertals were related to modern humans, it seems that members of our own lineage were among the ancestors of Neandertals.

The real challenge then will be finding the changes that played a major role in the evolution of chimps and humans since the two lineages split, 5 to 8 million years ago.

«Not only did the human lineage evolve in Africa, but also the group Hominoidea, in which humans and apes belong, also evolved in Africa.»

«Voice - affecting genes are the most over-represented as differentially methylated genes in the modern human lineage,» the researchers write.

As such, heand his colleagues wanted to pin down how old Chororapithecus was, in order to better pinpoint when the human and gorilla lineages may have first diverged.

The religion also served, through the ideal images of corpulence, to forge a sense of continuity in the community, the lineage, and the family beyond the short - term cycles of life that govern all humans and more particularly the prehistoric Maltese.

Artifacts from that period — the obese human and animal figurines and the phallic symbols carved in stone or bone and modeled in clay — point to the idea that the people had an obsession with the living world and its successful propagation through the descent group or lineage.

The reason, of course, is that human and dog descended from a common ancestor, the skeletal structure of which was preserved in its essentials in both lineages, while being repurposed in its details to cope with very different ways of life.

Walking upright is one of the defining features of the human lineage, and as feet are the only structure that make contact with the ground in bipeds, they can tell us a lot about our ancient relatives» way of moving.

«The maintenance of a strong block to HIV - 1 in Old World monkeys implies a selective advantage, presumably imposed by the presence of HIV -1-like viruses during the evolution of this primate lineage,» the scientists write, adding that although humans carry a version of TRIM5 - alpha, it is not as effective in thwarting HIV transmission.

Differences in mite lineages, the authors suggest, are consistent with the divergence of human populations and support the «Out of Africa» hypothesis.

If the migration from Indonesia to Madagascar was «a limited event» which brought only a small number of colonizers in a few voyages, then why does the human population of the island have such a high diversity of maternal and paternal lineages with Indonesian origin?

This result should give pause to evolutionary models that see a more modern human - like monogamous social structure evolving early in our lineage.