The kingdom Animalia consists of both protostomes and deuterostomes. Which of the following statements are true of protostomes? I.They have bilateral symmetry. II.During embryonic development, the opening that develops first is the mouth. III.They comprise the phylum Echinodermata.

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The kingdom Animalia consists of both protostomes and deuterostomes. Which of the following statements are true of protostomes?<br> I.They have bilateral symmetry.<br> II.During embryonic development, the opening that develops first is the mouth.<br> III.They comprise the phylum Echinodermata.






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