Multiple choice

Taxonomy of vertebrate divides fishes in to which two basic groups?

  1. Jawed and jawless

  2. Gilled and non-gilled

  3. Mammalian and non-mammalian

  4. Nematodes and non-nematodes

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A Correct answer
Explanation

Vertebrates are classified into two main groups based on the presence of jaws: Agnatha (jawless fish) and Gnathostomata (jawed vertebrates). Other options do not represent primary taxonomic divisions of fish.