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Distinguish the following:
Answer variants:
Organisms like Hydra are solitary.
As their body is flattened dorsoventrally (meaning from top to bottom), they are commonly known as flatworms.
They are commonly called as sponges.
These are parasitic worms that cause diseases such as elephantiasis and filariasis.
Porifera:
Coelenterata:
Platyhelminthes:
Nematoda:
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