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Explain what learned helplessness is and describe how it develops. Also discuss the effects it has on people and animals once it is established.
Cnidarians
A phylum of aquatic invertebrates that includes jellyfish, corals, and sea anemones, characterized by a simple body plan with a single opening and cnidocytes for capturing prey.
Hydras
Freshwater organisms belonging to the phylum Cnidaria, known for their simple tubular body and radial symmetry.
Complete Digestive System
A digestive system that has two separate openings for ingestion and egestion, allowing for a one-way flow of food and efficient digestion.
Flatworms
A group of invertebrates belonging to the phylum Platyhelminthes, characterized by their flattened bodies, bilateral symmetry, and lack of body cavity.
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