The estimated sex ratio at birth for 2014 is ________ boys born for every 100 girls
A) 105
B) 107
C) 110
D) 120
Answer: B
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If a species of frogs becomes threatened because they can only live in a narrow range of temperatures, they would be classified as a(n) ____________________
Fill in the blanks with correct word
Population in Russia
A) is largely clustered west of the Ural Mountains B) decreases in density as you travel from east to west C) has largely remained rural into the 21st century D) tends to be coastal, with significant concentrations along both the Arctic and Pacific coastlines E) is mainly found along the frontier with China
How can the oxygen-isotope ratio in the calcium carbonate shell remains of organisms found in ocean sediment provide information about past sequences of glacier advances and retreats?
How many microliters (mL) are there in 1 liter (L)?
A) 1 x 10^-12 B) 1 x 10^-6 C) 1 x 10^6 D) 1 x 10^12