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Chordata Protochordata - Questions and Answers

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16. Atrial and branchial apertures of Herdmania are surrounded by
A. Two lips
B. Three lips
C. Four lips
D. Five lips
Explanation:
17. In Amphioxus, circulatory system is
A. Closed
B. Without heart
C. Without respiratory pigment
D. All the above
Explanation:
18. Which is a protochordate
A. Herdmania
B. Labeo
C. Lung fish
D. None
Explanation:
19. Chordates have
A. Dorsal nerve cord
B. Dorsal tubular nerve cord
C. Brain
D. Ventral nerve cord
Explanation:
20. Hepatic portal system has evolved in protochordates
A. Hemichordates
B. Urochordates
C. Cephalochordates
D. All the above
Explanation:
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