Which statement is false? all organisms belong to one of three domains: bacteria, archaea, and eukarya. humans belong to the domain eukarya. prokaryotes can be found in both the archaea and bacteria domains. once an organism is classified, the classification cannot change. dna evidence can be used to classify organisms.

Once an organism is classified, the classification cannot change.

Explanation:

All organisms belong to one of three domains: Bacteria, Archaea, and Eukarya.  That is correct.

Humans belong to the domain Eukarya.  That is correct.

Prokaryotes can be found in both the Archaea and Bacteria domains.  That is correct.

DNA evidence can be used to classify organisms. That is correct.

Once an organism is classified, the classification cannot change. That is the only statement that can be refuted, since deep DNA studies can lead to a change in the classification of a given organism.

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