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Q2: A species found naturally in only one
Q8: In photosynthesis,the carbon in CO<sub>2</sub> is _
Q13: A mountain range along the coast of
Q15: What is the role of oxygen in
Q19: Organisms that gain energy by consuming preexisting
Q25: Which one of the following pairings of
Q43: Within a single molecule of water,_ bonds
Q49: Which of the following do plants use
Q53: Carbon is a compound.
Q88: What role do hydrogen bonds play in