Asked by crystal
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.
All Answers 1
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Scientists find new evidence in their studies.
New data (e.g., fossils, DNA sequences, biochemical and morphological studies) and improved methods (molecular phylogenetics, better microscopes, etc.) reveal relationships that differ from earlier ideas, so scientists revise classification systems to reflect the best current evidence. The other options either don’t cause change (repeating experiments with no change or finding similar evidence) or describe a limiting factor (using old methods) rather than the reason classifications are updated.
New data (e.g., fossils, DNA sequences, biochemical and morphological studies) and improved methods (molecular phylogenetics, better microscopes, etc.) reveal relationships that differ from earlier ideas, so scientists revise classification systems to reflect the best current evidence. The other options either don’t cause change (repeating experiments with no change or finding similar evidence) or describe a limiting factor (using old methods) rather than the reason classifications are updated.
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