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Ordovician is also called age of...

Ordovician is also called age of

A

annelids

B

arthropods

C

giant mollusca

D

echinoderms

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**Step-by-Step Solution:** 1. **Understanding the Ordovician Period**: The Ordovician is a geological period that is part of the Paleozoic Era. It follows the Cambrian period and precedes the Silurian period. 2. **Identifying the Dominant Life Forms**: During the Ordovician period, the seas were filled with a diverse range of invertebrate organisms. This includes various groups such as brachiopods, bryozoans, trilobites, mollusks, and echinoderms. 3. **Recognizing Key Organisms**: Among these organisms, the brachiopods, often referred to as "lamp shells," were particularly abundant. They are a type of mollusk and played a significant role in the marine ecosystems of the time. 4. **Determining the Age's Name**: Given that the Ordovician period is characterized by the dominance of these giant mollusks (specifically the brachiopods), it is often referred to as the "Age of Giant Mollusks." 5. **Conclusion**: Therefore, the Ordovician is also called the Age of Giant Mollusks. ---
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