A fossil species is found in the same rock layer with Fossil 3 and Fossil 4. When could this species have existed?
A) 500-245 MYA
B) 500-500 MYA
C) 540-245 MYA
D) 540-505 MYA

Suggest two reasons why irrigation is important for human development of the desert

In the von thunen model of agricultural land use, what is produced closest to the city epicenter? a. dairy, vegetables, and fruits b. field crops, such as corn and wheat c. beef and other animal products d. wood and lumber

Select the natural regions. delta denver forest georgia north america plateau stream