What do Eurasian milfoil, kudzu vine and the emerald ash borer have in common?
A. They are exotic species wreaking havoc in the ecosystems into which they have been introduced
B. They offer exciting prospects as potential sources of new drugs
C. They are all in danger of extinction in their native habitats
D. They offer promise as agents of biological control for pest species
Answer: A
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The first Chinese product that the British East India Company purchased was
A. silk B. toys C. porcelain D. tea
A boundary dispute in which there are no land boundaries concerns
A. North and South Korea B. Mongolia and China C. China and Russia D. The Spratley Islands
Which of the following is an example of a common ecosystem service?
A. Earthworm eat leaves and defecate deep in their burrows. B. Decomposer bacteria and other organisms cause leaves to decompose on the forest floor. C. People enjoy seeing wildlife. D. All of the statements are correct. E. None of the statements are correct.
In what decades did much of Africa become independent?
A) 1910s and 1920s B) 1930s and 1940s C) 1950s and 1960s D) 1970s and 1980s E) 1990s and 2000s