Worldwide, the majority of glaciers are ____
A)advancing
B)retreating
C)approaching the firn limit
D)flowing faster
E)flowing slower
B
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Which of the following gases was NOT part of Earth's original atmosphere?
A) water vapor B) carbon dioxide C) nitrogen D) oxygen E) both A and C
Where did the decline in mortality rates first begin, and what was responsible for it?
A. In East Asia, improvements to hygiene and diet lowered mortality rates. B. In North America, mortality declined along with lower fertility rates and better diets. C. In Africa, public health progress and reduction in birth rates helped mortality decline. D. In Western Europe, mortality dropped when public health and hygiene improved.
Biomes are determined based on
A) evolutionary history and degree of isolation. B) dominant faunal assemblages. C) life zones. D) topographic and climatic variables. E) easily identifiable vegetation characteristics of the dominant plants.
The recent abundance of the Maine Lobster in the North Atlantic Ocean is due to ________
A) a lobster fishing moratorium B) an on-shore breeding program C) human-induced climate change D) limiting fishing to one month a year E) the overfishing of cod