How many groups of vertebrae are there
The Rio Grande river runs from north to south and border to border through the center of the State.
The Ural Mountains
wrong
The Ural Mountains
wrong
The border for new Mexico, Colorado, and Arizona.
what geographic
Great Indian Desert
A border that follows a river or mountain range or similar natural feature.
The Rio Grande River.
This would be China and Russia to the southeast. The feature that separates these two countries is the Amur River.
Mexico