An important evolutionary step for reptiles was ________
A) the growth of scales from armor plating B) the formation of a true spine
C) lungs that could hold air D) the development of shell-covered eggs
D
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Ice tends to form at the
A) surface of bodies of water. B) bottom of bodies of water.
As manufacturing jobs were lost in the advanced industrial countries at the end of the 20th Century, which countries saw an increase in manufacturing jobs (though at lower wages)?
A) less-developed countries B) the countries of Sub-Saharan Africa C) newly industrializing countries D) Caribbean countries E) Central Asian countries
The _____ bonds between water molecules lead to water's cohesion.
A) ionic B) radioactive C) methane D) hydrogen
Which of the following locations would contribute to formation of mid-latitude cyclones?
A. where air converges and slows as it passes from an upper air trough to an upper air ridge principles B. where air spreads out and accelerates as it passes from an upper air trough to an upper air ridge C. where air converges and accelerates as it passes from an upper air ridge to an upper air trough D. where air spreads out and accelerates as it passes from an upper air ridge to an upper air trough