Significados de placental mammals en inglés

Fossils from the first placental mammals are relatively rare in the UK.

How did marsupials and placental mammals, with their squirmy pink babies, evolve from egg-laying ancestors?

These Jurassic mammals are ancestors to placental mammals, and are oldest of their kind found in Europe.

In placental mammals, an array of highly orchestrated immune elements to support successful pregnancy outcome has been incorporated.

These features conform to the pattern seen in placental mammals, indicating a basically similar rod pathway in M. domestica.

Such evidence as there is seems rather to suggest that South Africa was the cradle of the placental mammals.

The placental mammals developed.

Both RBC aggregation and cellular deformability have been reported to vary among species, including placental mammals, marsupials, terrestrial and aquatic mammals.

Until now, the distribution of Ucn in the central nervous system (CNS) has been studied only in placental mammals.

In placental mammals perforin is a single copy gene, but there are multiple perforin genes in all lineages predating marsupials, except birds.

Reptiles and amphibians have different systems, including temperature-dependent sex determination, and XY and ZW systems that differ in origin from birds and placental mammals.

It was an age when the primitive placental mammals were just beginning to diverge from each other, and had still many features in common.

On most of the continents it is placental mammals that dominate, but Australia was (and still is) the heartland of the marsupials.

Marsupials differ from placental mammals in that the young are born during a much earlier stage of development and must crawl inside their mother's pouch.

A revised molecular timescale based on these phylogenetic inferences suggests Afrotheria and Xenarthra diverged from other placental mammals approximately 103 (95-114) million years ago.

The numerical convergence (density ratio) of 146-156 rods to 4.7-6.0 RBCs to 1 AII cell is within the broad range found among placental mammals.