Which group does not contain polyp?
Correct answer: D. Calcerea
- A. Anthozoa
- B. Hydrozoa
- C. Scyphozoa
- D. Calcerea
Explanation
Calcarea is a group that does not contain polyps. Calcarea is a subclass of the phylum Porifera, which includes sponges. Sponges are not part of the Cnidaria, the phylum that includes anthozoans, hydrozoans, and scyphozoans, which all have polyp and/or medusa body forms. Anthozoans, for example, are a class of Cnidarians that include corals and sea anemones, which have a polyp body form. Hydrozoans and scyphozoans have both polyp and medusa body forms at different stages of their life cycles.
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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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