Which amino acid accounts for about 33% of the collagen structure?
A) alanine
B) glycine
C) hydroxyproline
D) proline
B
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Gasification and liquefaction techniques
A. refine petroleum to gasoline. B. transform natural gas to liquid gasoline. C. clean sulfur from petroleum. D. convert coal to more versatile fuel.
Physical geography's major function is to study and learn about:
a. human activity and the results thereof. b. Earth's environments and the processes that influence them. c. the physical and human features of a region. d. the composition of Earth's crust.
Of the following, which is energized by the wind?
A) Tidal bores B) Ocean currents C) Tides D) Deep ocean circulation E) The cryosphere
How would a chemical sedimentary rock form?
A) from the precipitation of minerals B) particles of preexisting rocks liberate by physical weathering, then cement together C) a metamorphic rock breaks down D) a sedimentary rock is intensely heated