Sentences with phrase «called placental mammals»
Thus, unraveling the story of the so - called placental mammals is central to understanding mammalian evolution.
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Conventional wisdom holds that the precursors of modern placental and marsupial mammals arose toward the end of the Jurassic in the Northern Hemisphere, based on the ages and locations of the earliest remains of these shrewlike creatures, which are characterized by so - called tribosphenic molars.
Scientists already know that a gene called Insl3 is important for testicular descent in placental mammals and marsupials.
Chief among them was the finding that in all placental mammals FOXP3 acts through a snippet of DNA called the CNS1 enhancer to trigger the formation of a cohort of Tregs designated «peripheral» (whereas most Tregs are produced in the thymus gland, which sits between the lungs, a subset of the cells act as sentinels suppressing runaway immune responses in the body's peripheral tissues).