Sentence examples for period of evolutionary from inspiring English sources

A biologist writes that one key period of evolutionary ferment, long before the emergence of modern humans, was between two and a half and two million years ago.

The extraordinary remains are thought to represent a period of evolutionary transition between tree-dwelling apes and the earliest human ancestors, or hominids, to take their first tentative steps on two feet.

But even if the jaw alterations were due to natural selection, she concludes, they would have taken place over a relatively short period of evolutionary time.

Ancient samples of the microbes indicate that they have remained essentially unchanged for the past 2.3 billion years the longest period of evolutionary stasis ever discovered, according to The Washington Post.

The same problem also confronts cladistic race, since the number of races will vary from nine, at the most recent period of evolutionary reproductive isolation, to just one, if we go back to the very beginning, since all humans were originally Africans.

There is a long-running debate about whether this Cambrian explosion was truly a very rapid period of evolutionary experimentation; alternative views are that modern-looking animals began evolving earlier but fossils of their precursors have not yet been found, or that the "weird wonders" are evolutionary "aunts" and "cousins" of modern groups.

During those periods of evolutionary change, new methods of feeding and living led to diversity of insect mouthparts and limbs, the origin of metamorphosis, and other changes.

Fig. 5 The evolution of Phacops seen as long periods of evolutionary stability ("stasis")—"punctuated" by episodes of rapid evolutionary change during speciation events (Steve Thurston, AMNH).

(I will devote a future "Editor's Corner" to what we think we know causes such unexpectedly long periods of evolutionary stability—"stasis").

However, in light of considerable evidence for conservatism in coarse-resolution ecological niche characteristics of moderate periods of evolutionary time (Peterson 2011), we do not view these issues as being especially problematic.

The emerging view is that ecological niches at least those defined in terms of the so-called scenopoetic variables such as climate are indeed quite surprisingly stable through at least moderate periods of evolutionary time.