Sentence examples for have been extant from inspiring English sources

Archaeobotanical studies confirm that some of those plants were available and used by humans in the past while others would have been extant at least in forest refugia, even during glacial periods.

The 25 leaves now lost must have been extant when that note was written.

Analysis of eukaryotic proteomes has shown that all but a small proportion of the eukaryotic protein repertoire is formed from protein domains which have been extant since the origin of eukaryotes [ 67].

But consider the lesser uni-table, which has been extant for 35 years and is also known as doop.

The NRFL project has been extant for two years, with Rugby Law having hosted talent combines in Minnesota and Los Angeles as it looks to create a professional league.

And even "new" trucks use ancient technology that has been extant in pickups for at least 60 years.

Legitimate use of arsenic compounds as drugs has been extant since the advent of salvarsan in 1909.

Efforts to establish the rate of mutation of these isolates or genome analysis of a more temporally and spatially diverse collection of isolates from this region might help estimate the amount of time M. ulcerans has been extant in West Africa.

Although the antecedents of dependence have been discussed, extant research lacks an understanding of the explanatory mechanisms of how dependence – or even lock-in situations – actually evolve.

The fossils have been compared with extant and other fossil species hitherto described in this genus.

As De Pietri et al. ([97]: p. 1) note, fragmentary Eocene fossils from throughout the world have been referred to extant procellariform families [98] [100]; and more complete stem procellariforms are known from the early Oligocene [97], [101].