Rhaphidograptus toernquisti managed to persist, unchanged, for some five million years.
The real problem, which also goes unmentioned, is that dangerous deficits will accumulate over time if continuing trends and policies — especially in health care — persist unchanged.
Wöhler and Liebig showed that a certain group of atoms persisted unchanged through a series of important related compounds, including benzoic acid.
The fact that homeoboxes apparently operate independently of selection (since they have persisted unchanged for hundreds of millions of years) indicates that, to an important extent, form is independent of function.
Behind their reappearance lies an extraordinary story, a tale of flowers that have persisted unchanged for centuries and of the unlikely band of experts who united to rescue them from extinction.
RESULTS: The rim of FDG accumulation was seen on the first post-treatment scan obtained 1-3 mo after therapy and persisted unchanged over the 2-26 mo follow-up period.
4.1, since the only attractors have (rho=1), these will persist unchanged for finite N and any (psi_{k}), as γ and (gamma_{2}) will both equal 1 in this case.
Naturally occurring, auto-reactive B cells have been found to undergo several distinct fates in vivo: they can be physically eliminated, functionally inactivated, or they can persist unchanged or become activated (Goodnow 1992).
In the atomist system, change only occurs at the level of appearances: the real constituents of being persist unchanged, merely rearranging themselves into new combinations that form the world of appearance.
The company, however, also noted that "challenges persisted unchanged" in the region as revenues declined by 1.4% to to €3.8 billion ($5 billion) and service revenues specifically were down by nearly 10% to $4.1 billion, as the carrier sits tight and waits for a marketing deal with Apple to kick in this year.
The cavy is the "just right" example, as the larger extinct edentate mammal species are less closely similar and more distantly related to the living species, and the fossil invertebrates seemed to Darwin to persist unchanged into the modern fauna (Fig. 5).
