Definition:
n. Animal that does not have a backbone. Invertebrates are the most numerous group of animals, making up over 90 percent of all animal species. (Source: Ricklefs)
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By Laura Klappenbach, About.com
n. Animal that does not have a backbone. Invertebrates are the most numerous group of animals, making up over 90 percent of all animal species. (Source: Ricklefs)
Navigate Glossary: Glossary Index > I
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