Why are modern tetrapod ectotherms restricted to living within roughly 45 degrees latitude of the Equator

What is the primary purpose of a game reserve?

Jennifer is visiting her grandmother, who lives in the northeast corner of oklahoma. the region is home to many lakes, and jennifer enjoys canoeing on the illinois and grand rivers. to which region of oklahoma is she traveling? the prairie plains, the ozark plateau, the red river plains, the red beds plains

As water is cooled from 4 c to 0 c its density