Ascaris is characterized by:
Correct answer: D. Presence of neither true coelom nor metamerism
- A. Presence of true coelom but absence of metamerism
- B. Presence of true coelom and metamerism (metamerisation)
- C. Absence of true coelom but presence of metamerism
- D. Presence of neither true coelom nor metamerism
Explanation
Ascaris belong to the Phylum Nematoda of Superphylum Aschelminthes.They have a cylindrical body without showing any metamerism, a pseudocoelom (false coelom) and a complete digestive tract lined by endodermal epithelium. The cuticle covering the body surface bears minute transverse striations giving a pseudosegmented appearance to the worm.
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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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