Sentence examples for have existed based from inspiring English sources

This large graphic (nearly 6 feet high) depicts a timeline of 23 hominid species, showing the range of time that each one is known to have existed based on fossil evidence.

First, selection bias might have existed based on the assumption that patients diagnosed with breast cancer or treated with tamoxifen tend to be monitored more closely with more opportunities for diabetes screening.

Both measures reflect required ghost lineages, which is the amount of extra time a lineage is assumed to have existed based on an earlier appearance of its sister-group [ 143].

The issues of working length determination, its apical extent, and the position of the final root canal filling have been controversial, as differing points of view have existed between the biologically based and clinically based endodontic gurus regarding this concept for decades.

Inscriptions indicate ownership of cows may have been as important as cultivable land and that there may have existed a social hierarchy based on this.

The putative common ancestor to both "sister genera" was hypothesized to have existed in northern Asia, based on reported fossil pollen records that date the taxa to the early Oligocene or lower Eocene of the lower Tertiary, with speciation accompanied by migrations during the Tertiary and Quaternary periods – forced southward by the advancing polar ice sheets.

At some point during this period additional stone buildings were constructed along the Lower Ward, on the side of the current mansion, and records suggest that a ditch, or moat, may have existed around the base of the Tor in the 14th century.

A possible explanation being the fact that the EMR systems have existed in parallel with paper based medical records, leaving the physicians to choose which medium to use.

Selective enrollment math- and science-focused high schools, which admit based on achievement, have existed for several decades (e.g., Subotnik, Tai, & Almarode 2011).

Our result showed that this high frequency in Mexico City was not due to any bias that could have existed in prior reports that were based on data from only one institution.

With an increasing number of complete genomes and draft genome sequences available for the Saccharomyces lineage, it became possible to reconstruct a yeast ancestral genome as it may have existed just prior to the WGD based on syntenic gene order conservation (Gordon et al. 2009).