Polychaetes: Prominent Or Feminist?

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Polychaetes are now considered as the most abundant species of marine worms today as we have identified around 10,000 species of them and counting as the technology for marine research is becoming more sophisticated, but HOW LONG DO THEY EXIST?? The existence of polychaeta began during the Pre-cambrian explosion, same age as the the existence of pre-complex life forms such as trilobites and sponges. It was became evident when a fossil of Polychaete was found in a Burgess shale which is located in British-Columbia's Yoho national park near at the Hudson bay. Another evidence is the fossil of Polychaete that was found in a locality named Francis Creek shale formation that is located in the fossil beds of Mazon creek in Illinois, a Midwestern
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