Which invertebrate phylum possesses the following features?
Bilateral symmetry, triploblastic, metamerism, open vascular system
A
Annelida
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B
Mollusca
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C
Arthropoda
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D
Aschelminthes
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Solution
The correct option is C
Arthropoda
Bilateral symmetry, triploblastic nature and metamerism are seen in both Annelida and Arthropoda. However, arthropods possess an open vascular system, while annelids possess a closed type.