The example of an animal which has a complete digestive system is
Correct answer: D. roundworm
- A. jellyfish
- B. tapeworm
- C. liver fluke
- D. roundworm
Explanation
A complete digestive system is characterized by a digestive tract that has two separate openings: a mouth for ingestion and an anus for excretion. This allows for a more efficient and directional process of digestion and nutrient absorption. In this question, the roundworm is the correct example of an animal with a complete digestive system. Jellyfish have an incomplete digestive system with only one opening, which serves both as the mouth and the anus. Tapeworms lack a digestive system entirely because they absorb nutrients directly from the host's gut through their skin. Liver flukes, similar to jellyfish, also have an incomplete digestive system with a single opening. Therefore, the only correct choice is roundworm, which has a complete digestive system.
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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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