The single main opening of the sponge cavity is known as?
Correct answer: B. Osculum
- A. Ostia
- B. Osculum
- C. Sponogocoel
- D. Both a and b
Explanation
The osculum is the large opening in a sponge through which water exits after passing through the sponge's body for the purpose of filter feeding. It serves as the exit point for water carrying waste and facilitates gas exchange in sponges.
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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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