The surface of the Earth is altered by
A. abrasion.
B. erosion.
C. chemical weathering.
D. plate tectonics.
E. All of the options are correct.
Answer: E
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The Convention on Biological Diversity is an international treaty
A) ratified by the United States to globally limit the loss of biodiversity. B) ratified by the United States to limit the international trade of endangered species. C) that aims to conserve biological diversity worldwide but has not been ratified in the United States. D) that would purchase all endangered species habitats in the world but has not been ratified in the United States.
The philosophy of classical economics developed by Adam Smith ________
A) assures equality between rich and poor B) advocates free-market policies that many credit for the tremendous gains in material prosperity of industrial nations C) proposes maintenance of economies through government restraint and regulation D) was adopted by the Aborigines in the Kakadu region of Australia E) argues that individuals acting in their own self-interest harm society
When will a protein have the lowest solubility?
A) when the pH is very low B) when the pH = 7 C) when the pH is very high D) at its isoelectric point
Non-greenhouse gases make up more than 99.9% of the dry atmosphere
a. True b. False