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Invertebrates have an adaptive immune and an innate immune system.
Narrowly Defined
Described or specified with a high degree of precision and detail, often used to limit the scope or focus of a concept or category.
Available Substitutes
Alternatives to a product or service that are readily accessible to consumers, affecting demand and pricing strategies.
More Elastic
Describes a greater sensitivity of demand or supply to changes in price or other economic factors.
Perfectly Inelastic
A market situation where the quantity demanded does not change as the price changes.
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