The scientific term for biological classification categories is the:(1) Species(2) Taxon(3) Phylum(4) Domain

The scientific term for biological classification categories is referred to as "Taxon." In taxonomy, "Taxon" is a group of one or more populations of an organism or organisms that form a unit. Taxa (plural of taxon) can be classified at different ranks such as species, genus, family, order, class, phylum, kingdom, and domain, among others. This hierarchical structure helps biologists categorize and understand the relationships between different organisms based on shared characteristics and evolutionary history.

Among the options given:

1. Species refers specifically to a group of organisms that can interbreed.
2. Taxon is the general term for any group of organisms in biological classification.
3. Phylum is a higher taxonomic level that encompasses a group of related classes.
4. Domain is the highest taxonomic rank.

Thus, the correct answer is (2) Taxon.