Which class do starfish belong to?
Correct answer: A. Asteriodea
- A. Asteriodea
- B. Ophiuroidea
- C. Holothuroidea
- D. Crinodiea
Explanation
Starfish belong to the Class Asteroidea, characterized by the presence of five or more arms not sharply set off from a central disc. They are free living marine animals that occur on sandy or muddy bottoms and crawl about over rocks and shells. All are carnivorous, feeding mainly on crustaceans, polychaetes and molluscs. They also feed on detritus and plankton. They generally exhibit remarkable powers of autotomy and regeneration.
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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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