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
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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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Question : Identify an example of diploblastic animals.
Question : Identify the animal that is not a non-chordate.
Question : Identify animals that are not triploblastic.
Question : Parts of the following sentence have been given as options. Select the option that contains an error.
An lion is the most ferocious of all animals.
Question : Which group of Kingdom Animalia has unsegmented, bilaterally symmetrical, soft bodies, with a triploblastic construction (comprising three layers of cells) and a lacking coelom, skeleton and anus?
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