What is used to sub-divide the Phanerozoic into 3 eras?
A. It is divided based on numerical time calculations.
B. It is divided by mass extinction events.
C. It is divided into equal intervals.
Answer: B
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Organisms that live in estuaries like the one pictured below must be able to
A) survive for part of their life in a lentic system and the other part of their life in a lotic system.
B) tolerate a wide range of salinities.
C) survive in both the epipelagic and hadal zones.
D) derive energy when living near deep-sea thermal vents.
Which of the following is not considered one of the global crop hearths?
A) East Asia B) Sub-Saharan Africa C) Southwest Asia D) Southeast Asia E) Central North America
A large number of Americans rely on groundwater for drinking water.
Answer the following statement true (T) or false (F)
A psuedocylindrical projection ________
A) is an oval projection B) cannot be used with interrupted projections C) is the kind of projection used in most of your textbook's maps D) does not have central meridians and parallels E) is not a type of projection explained in your textbook