Which of the following fish is safe and environmentally friendly to eat?
A. Wild salmon
B. Yellowfin tuna
C. Swordfish
D. Haddock
E. Albacore tuna
Answer: A
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Humans have changed ecosystems more rapidly and extensively in the last 50 years than in any other period.
Answer the following statement true (T) or false (F)
During the third Phase of migration to the U.S. (1870-1920), where did the majority of immigrants come from?
A) England and Africa B) Ireland and Germany C) Southern and Eastern Europe D) Canada and Latin America E) Latin America and Asia
Which of the following explains why the boiling points of ethers are more similar to those of comparable alkanes than to those of comparable alcohols?
A) Both ether molecules and alkane molecules are nonpolar. B) Hydrogen bonding between ether molecules is weak. C) Although ether molecules are polar they cannot form hydrogen bonds to other ether molecules. D) None of the above is the correct explanation.
The Canadian province of Alberta has the world's largest commercially developed deposit of which fossil fuel?
A) Anthracite coal B) Natural gas C) Petroleum D) Tar sands