Simplify the following text for a Grade 10 native English-speaking person.
Original: The taxonomy of the Gastropoda as shown in various texts can differ in major ways , and on-going revisions of the higher taxonomic levels are to be expected in the near future .
Simplified: The taxonomy of the Gastropoda can be different from author to author . With the arrival of DNA sequencing , further revisions of the higher taxonomic levels are to be expected .