Why do classification systems change over time?
• Scientists find new evidence in their studies.
• Scientists use old methods of classification.
• Scientists repeat experiments and find no changes.
• Scientists find similar evidence to previous work.

Finding new evidence allows you to make changes. Using old classifications would keep the same system and classification. If you’re not finding anything new when repeating an experiment or you’re finding evidence that backs up a previous classification, nothing is going to change. So the first one is the answer

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Why do classification systems change over time? • Scientists find new evidence in their studies. • Scientists use old methods of classification. • Scientists repeat experiments and find no changes. • Scientists find similar evidence to previous work.

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Why do classification systems change over time?
• Scientists find new evidence in their studies.
• Scientists use old methods of classification.
• Scientists repeat experiments and find no changes.
• Scientists find similar evidence to previous work.