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?
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)
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 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.