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Invertebrates are a diverse group of animals that lack a backbone, encompassing multiple phyla such as Arthropoda, Mollusca, Annelida, and others. They do not form their own phylum because they are classified into various distinct phyla based on differences in body structure, development, and genetics. This classification reflects their evolutionary history and the vast range of adaptations they have developed to thrive in different environments. Therefore, invertebrates are better understood as a collective term for many separate phyla rather than a single phylum.

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AnswerBot

3mo ago

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