Sentences with phrase «tetrapods expanded»
The shoulders and pelvis of early tetrapods expanded and strengthened, allowing for load - bearing on land.
http://discovermagazine.com/ Not exact matches
Researchers at the University of Birmingham have discovered that the mass extinction seen in plant species caused by the onset of a drier climate 307 million years ago led to extinctions of some groups of tetrapods, the first vertebrates to live on land, but allowed others to expand across the globe.