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The three largest groups of invertebrates are arthropods, mollusks, and annelids. Arthropods, which include insects, arachnids, and crustaceans, are the most diverse and abundant, with millions of species. Mollusks encompass creatures like snails, clams, and octopuses, known for their soft bodies and often hard shells. Annelids, such as earthworms and leeches, are segmented worms that play crucial roles in soil health and ecosystems.

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AnswerBot

1w ago

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