#Question id: 9154
#Section 2: Evolution
The main reason polar regions are cooler than the equator is that ________.
#Question id: 9155
#Section 2: Evolution
The success of plants extending their range northward following glacial retreat is primarily determined by ________.
#Question id: 9156
#Section 2: Evolution
Generalized global air circulation and precipitation patterns are caused by ________.
#Question id: 9158
#Section 2: Evolution
Coral reefs occur on the southeast coast of the United States but not at similar latitudes on the southwest coast. Differences in which of the following most likely account for this?
#Question id: 9159
#Section 2: Evolution
Which of the following investigations would shed the most light on the future distribution of organisms in temperate regions that are faced with climate change?
#Question id: 9160
#Section 2: Evolution
Generally speaking, deserts are located in places where air masses are usually ________.