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Nucleic acids contain phosphorus but not sulfur.
Starting Point
The initial position, condition, or framework from which a process, activity, or discussion begins.
Backtracking
A problem-solving technique that involves progressively testing solutions and, if they fail, reverting to previous steps to try alternative solutions.
Main Street
Main Street often refers to the primary retail street of a town or a neighborhood, where a significant amount of commercial activity occurs.
Creativity
Cognitive processes that employ appropriate novelty; originality that suits some purpose.
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