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    Exam 9: Annelids, Nematoda, Echinoderms, Primates, Biodiversity, and Speciation
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    Which Phylum Was the First to Exhibit Bilateral Symmetry with a Distinct
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Which Phylum Was the First to Exhibit Bilateral Symmetry with a Distinct

Question 16

Question 16

Multiple Choice

Which phylum was the first to exhibit bilateral symmetry with a distinct head with sensory organs?


A) Porifera
B) Cnidaria
C) Platyhelminthes
D) Molluca

Correct Answer:

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