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The trade-off between the production of one good and the production of another good can change over time because of technological advances.
Cnidarians
A phylum of aquatic invertebrate animals that includes jellyfish, corals, sea anemones, and hydras, characterized by a simple body structure with a single opening and tentacles with stinging cells.
Stinging Cells
are specialized cells found in various marine organisms such as jellyfish and corals, used for capturing prey and defense by discharging toxic substances.
Toxin-Filled Capsule
A structure containing poisonous substances, often produced by microorganisms as a defense mechanism or to attack other cells.
Flatworm
A type of simple, soft-bodied invertebrate animal that is a member of the phylum Platyhelminthes, which includes planarians, flukes, and tapeworms.
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