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Question : Which of the following animals have a single opening in their digestive system that serves both as a mouth and an anus?

Option 1: Arachnids

Option 2: Echinoderms

Option 3: Platyhelminthes

Option 4: Arthropods


Team Careers360 8th Jan, 2024
Answer (1)
Team Careers360 15th Jan, 2024

Correct Answer: Platyhelminthes


Solution : The correct option is Platyhelminthes .

Platyhelminthes, or flatworms, are a phylum of soft-bodied invertebrates. They include both free-living and parasitic species. Flatworms are characterised by a flattened, ribbon-like body and bilateral symmetry. They lack a body cavity (coelom) and have a simple digestive system with a single opening that serves as both the mouth and anus. Some of its examples include planaria, tapeworms, etc.

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