Roundworms have all of the following characteristics except:
Correct answer: E. Notochord
- A. Pseudocoelom
- B. Bilateral symmetry
- C. Mesoderm germ layer
- D. Ectoderm germ layer
- E. Notochord
Explanation
Only members of the phylum Chordata have notochords. Roundworms are in the phylum Nematoda.
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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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