All of the following coelenterates show alternation of generation except:
Correct answer: A. Hydra
- A. Hydra
- B. Obelia
- C. Aurelia
- D. All of these
Explanation
Metagenesis or alternation between polyp and medusa forms is a characteristic feature of phylum cnidaria. However, hydra exists only as a polyp and does not exhibit metagenesis.
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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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