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The testing uses proper controls . Scientists present their results in peer-reviewed scientific papers published in scientific journals . A scientific research paper consists of several well-defined sections : introduction , materials and methods , results , and , finally , a concluding discussion . Review papers summarize the research done in a particular field over a period of time . Biology is the science that studies life , but what exactly is life ?
Please check all the words that can be used instead of the target word in the same context. Note that the morphology of the target (third person singular, past tense etc.) is considered to be applied to the candidate automatically in the process of paraphrasing.