Glaciers are like dirty snowballs because they
A. are round.
B. roll like a ball.
C. are always melting.
D. consist of debris embedded in ice.
Answer: D
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The population pyramid of a city in southern Florida, Arizona, or even northern Japan may have a visual appearance of ________ because the city's population is dominated by elderly people
A) being "upside down" B) having a wide base C) having perfectly vertical sides D) being an "age-sex ratio" E) being "rightside-up"
Which of the following pairs of amino acids has hydrophobic interactions?
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Soil is composed of 70% mineral matter, 5% organic matter, and varying amounts of water and air totaling 25%
Indicate whether the statement is true or false