Sentence examples for animals arose from inspiring English sources

Because collagen is not found among unicellular eukaryotes, even those forming colonies, it is one of the indications that animals arose once from a common unicellular ancestor.

But that no longer appears to be the case.The Burgess Shale came soon after a period of time known as the Cambrian explosion, when most major groups of complex animals arose over a surprisingly short period.

The evolutionary conservation of the Hox genes may be the explanation for the puzzling observation that most of the diversity of body plans within major groups of animals arose early in the evolution of the group.

Like his paternal grandfather and scientific predecessor Erasmus Darwin, Charles Darwin was convinced that plants and animals arose naturally from simple nonliving inorganic compounds.

And debate rages over whether our differences from other animals arose during one sudden phase shift, as he argues, or a series of logical steps.

According to a new analysis in the current issue of the Proceedings of the National Academy of Sciences, primordial animals arose 670 million years ago.

"In the sweep of history, we don't often see new groups or classes of domesticated animals arising," he said.

These effects, which are very general and experimentally demonstrated in many animals, arise from the presence of large numbers of molecules at high concentration.

Although the bile pigments of animals arise in all probability from the catabolism of heme precursors, there is evidence that bilirubin, accompanied by iron salts, promotes the synthesis of new hemoglobin when injected into humans, dogs, or rabbits suffering from secondary anemia.

However, both cnidarians and ctenophores have a type of muscle that, in more complex animals, arises from the middle cell layer.

Both ctenophores and cnidarians have a type of muscle that, in more complex animals, arises from the middle cell layer, and as a result some recent text books classify ctenophores as triploblastic, while others still regard them as diploblastic.