Which of the following statements are true for the phylum Chordata?
(A) In Urochordata, notochord extends from head to tail and it is present throughout their life.
(B) In Vertebrata, notochord is present during the embryonic period only.
(C) Central nervous system is dorsal and hollow.
(D) Chordata is divided into 3 subphyla: Hemichordata, Tunicata and Cephalochordata.

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D and C

C and A

A and B

B and C

answer is C.

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Detailed Solution

B and C are correct. A and D are incorrect.
A. Notochord extends from head to tail and is present throughout their life in Cephalochordata.
B. In vertebrates, notochord is present during the embryonic period only and is replaced by a vertebral column found in the adult stage.
C. The central nervous system of chordates is dorsal and hollow.
D. Chordata is divided into three subphyla: Urochordata (Tunicata), Cephalochordata and Vertebrata.
Hemichordata is a nonchordate phylum.

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