Sentence examples for descendant form from inspiring English sources

Further complicating matters is that evolution from ancestral to descendant form is usually a stepwise process.

This view suggests that species such as H. erectus may have exhibited little or no morphological change over long periods of time (evolutionary stasis) and that the transition from one species to a descendant form may have occurred relatively rapidly and in a restricted geographic area rather than on a worldwide basis.

Paedomorphosis is the type of heterochrony where there is less growth during ontogeny in a descendant form, compared with its ancestor.

Paedomorphosis occurs if the period of growth of the descendant form is stopped prematurely progenesis (hypomorphosis of Reilly et al. 1997); if onset of growth is delayed postdisplacement; or if the rate of growth is less in the descendant than in the ancestor neoteny (deceleration of Reilly et al. 1997) (Figs. 2 and 3).

Because organisms generally change in shape as well as increase in size during their development, any variation to the duration of growth or to the rate of growth of different parts of the organism can cause morphological changes in the descendant form.

Bacteria have thus had plenty of time to adapt to their environments and to have given rise to numerous descendant forms.

Recognizing the effect of heterochronic processes requires knowledge of ontogenetic information from both ancestral and descendant forms.

However, selection brought on by predation pressure will produce anagenetic evolutionary trends, where ancestral species are progressively replaced by the descendant forms and do not persist.

In any event, subsequent to the establishment of the major groups of living organisms, we do find a very strong overall signal when we compare the distribution of characteristics among the presumed descendant forms.

The second half shifts into pure fiction, but the stories of its four protagonists – an Irish maid, inspired by Douglass to emigrate to America, and three successive generations of her female descendants – form a narrative strand that loosely links the parts of the first half together.

The Inuit of the Thule culture whose descendants form the majority of the current population arrived nearly a thousand years ago, with the first arrivals dated to approximately 13th and 14th century.