Biology · THE LIVING WORLD

Consider the terms: 'Dogs', 'Mammals', and 'Animals'. Which of the following statements is correct regarding these terms?

1. They all represent the exact same taxonomic category at the same hierarchical level.
2. They represent taxa at different hierarchical levels, where 'Dogs' is a taxon within 'Mammals', and 'Mammals' is a taxon within 'Animals'.
3. 'Dogs' is a category, whereas 'Mammals' and 'Animals' are specific epithets.
4. None of them are scientific taxa; they are only morphological aggregates.