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Chordata Protochordata - Questions and Answers

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26. Notochord has been replaced in vertebrates by
A. Brain and spinal cord
B. Cranium and vertebral column
C. Post-anal tail
D. Both A and B
Explanation:
27. Protochordates are
A. Nonvertebrates
B. Acraniates
C. Prevertebrates
D. All the above
Explanation:
28. Epidermis of chordates is
A. Single layered
B. Transitional
C. Stratified
D. Absent
Explanation:
29. Heart of hemichordates is
A. Ventral
B. Dorsal
C. Lateral
D. Absent
Explanation:
30. Balanoglossus lives in
A. U-shaped burrow
B. Vertical burrow
C. Oblique burrow
D. Horizontal burrow
Explanation:
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