The term “head” in vertebrate morphology includes
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Which of the following organisms neither have notochord nor vertebral column in the adult stage?
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Paired segmental nerves have dorsal and ventral roots in
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Bilateral symmetry is seen in the body organisation of
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The three germ layers , namely ectoderm, endoderm and mesoderm are found in
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Which of the following is a characteristic chordate character?
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Which of the following structures is present in all the chordates?
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Madreporite is associated with
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Sausage shaped body form is a chacteristic of
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Main difference between starfishes and brittle stars is in the
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