Etymology
The word "invertebrate" is derived from the Latin word "invertebratus," meaning "without backbones." It was first used in the 18th century by the French naturalist Jean-Baptiste Lamarck.
Meaning
An invertebrate is an animal that lacks a backbone, or vertebral column. Invertebrates are classified into numerous phyla, including arthropods, mollusks, annelids, and cnidarians.
Origin
The origin of invertebrates dates back to the Precambrian period, over 540 million years ago. The first invertebrates were likely simple, worm-like creatures that lived in the oceans. Over time, invertebrates evolved into a wide range of forms and adaptations, eventually giving rise to such diverse groups as insects, lobsters, and jellyfish.
Significance
Invertebrates play a crucial role in the ecosystem. They are the primary consumers of plants and decompose organic matter, releasing nutrients back into the soil. Invertebrates also provide food for a wide range of animals, including fish, birds, and mammals.
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