The fin-back reptiles are called ____________________, and they went extinct in the
____________________. Fill in the blank(s) with the appropriate word(s).
pelycosaurs, Permian
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Discuss the development of the giant aquatic mammals. What will be an ideal response?
What are the three economically strongest countries in Latin America, accounting for 80% of the region's manufacturing output?
a. Cuba, Venezuela, and Mexico b. Brazil, Argentina, and Mexico c. Brazil, Chile, Panama d. Brazil, Mexico, Honduras e. Mexico, Guatemala, Ecuador
The catastrophe at ________ in March 2011 has once again raised fears surrounding nuclear power
A) Fukushima B) Three Mile Island C) Darlington Three Island D) Guangdong-2 (Wangong-2) E) Chernobyl (Chornobyl)
The idea of base level refers to
A) an evolutionary cycle of landscape development from fluvial action. B) the amount of discharge in a particular reach of a stream. C) a level below which a stream cannot erode its valley. D) the stream gradient. E) the average height of a stream channel.