Exam (elaborations)
CST Biology 1 TOP Exam Guide Questions and CORRECT Answers
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a chemical in the saliva broke down the starch in the gel. - A student filled two Petri dishes with a clear cornstarch gel, then marked the letter "X" invisibly onto the gel in Petri dish 1 with a damp cotton swab. He then placed saliva from his mouth onto a second cotton swab and used that...
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