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Which of the following is NOT a common substance in living systems?  A.) Urea B.) Ammonia C.) water D.) Carbon Which of the following is not a common substance in living systems? A.) ATP B.) Cellulose
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Which of the following is NOT a common substance in living systems? 

A.) Urea
B.) Ammonia
C.) water
D.) Carbon

Which of the following is not a common substance in living systems?

A.) ATP
B.) Cellulose
C.) mineral salts
D.) molecular oxygen

User Rotman
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5 votes

Answer:

first one is b the second is d

Step-by-step explanation:

User Shreddd
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