31. The spice cinnamon and the drugs cascara and quinine all come from bark, the
A
protective out layer of stems and roots of woody plants.
B C D
33. Taste buds, small sensory organ located on the tongue and palate, recognize four
A B
primary tastes: sweet, sour, salty and bitter.
C D
39. Few substances on Earth equal the beauty of gemstones such as twinkling
A B C
diamonds, green emeralds, red rubies, blue sapphires, and multicolored opals.
D
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