All animals having a single opening to the outside that serves both as mouth as well as anus except?
Correct answer: A. Octopus
- A. Octopus
- B. Asterias
- C. Ascidia
- D. Fasciola
Explanation
Octopuses do not have a single external opening for both ingestion and egestion. Octopuses have a more complex digestive system compared to some other animals. They have separate openings for ingestion and egestion.
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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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