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Answer:

Across
1Which two functional _____ are always found in amino acids?
3-must have 4 different elements -must be a mirror image -letter arrangement doenst matter
5Amino acids are acids because they always possess which functional group?
6One of the following people set up a _____ system to mimic Earth's early atmosphere and discharged electrical sparks through it. A variety of organic compounds common in organisms were formed. Who did this?
7What is the pH of a solution with a proton, [H+], concentration of 10-8 _____
Down
2Assume that acid rain has lowered the pH of a _____ lake to pH 4.0. What is the hydroxide ion concentration of this lake?
4carbon, hydrogen, nitrogen, _____
5The lowest level of biological organization that can perform all the activities required for life is the
 
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