Sentences with phrase «ancestor of clade»

Using mutation rates as a molecular clock, the authors determined that the ancestor of clade A jumped from a bovine host to humans between 1894 and 1977 and clade B made the jump between 1938 and 1966.

Not exact matches

Most of the S. aureus found in monkeys were part of a clade, a group with common ancestors, which appeared to have resulted from a human - to - monkey transmission event that occurred 2,700 years ago.

Thus, the morphological similarities that led to their classification into the same clade are not the result of descending from a common ancestor, but reflect adaptations to related environments (convergent evolution).

«We think based on the morphology that the Sima people were part of the Neanderthal clade,» Arsuaga said, «although not necessarily direct ancestors to the classic Neanderthals.»

This evidence indicates that LB1 is not a modern human with an undiagnosed pathology or growth defect; rather, it represents a species descended from a hominin ancestor that branched off before the origin of the clade that includes modern humans, Neandertals, and their last common ancestor.

Habitual bipedal locomotion is a defining feature of modern humans compared with other primates, and the evolution of this behaviour in our clade would have had profound effects on the biologies of our fossil ancestors and relatives.

In our discussion below we therefore refer to descendants of the placozoan — cnidarian — bilaterian last common ancestor as Eumetazoa, and reserve «Eumetazoa sensu stricto» for the more limited clade defined by descendants of the cnidarian — bilaterian ancestor.

Results: Phylogenetic analysis of 77 K. pneumoniae (48 clinical and 29 non-clinical isolates) demonstrated that the two groups were intermixed throughout the tree and in some cases resided in the same clade, suggesting recent divergence from a common ancestor.

However, the fact that we detected only 13 — 14 base pair substitutions between the closest mainland gray fox lineage and the northern / southern island fox ancestor suggests that the date of divergence for the island fox clade could be more recent than 9200 years ago.

The results imply that the Hula painted frog is not merely another rare species of frog, but is actually the sole representative of an ancient clade of frogs (a group with a single common ancestor).

Even more surprising, the age of the modern polar bear crown group (the clade containing the last common ancestor of all extant members) is estimated to be less than 45 ky, slightly older than the age of the ABC bears (Fig. 3A), a date that is also found with the expanded dataset of control - region sequence fragments (Fig.