Question

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 Vertebrate 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.

• A. (d) and (c)
• B. (c) and (a)
• C. (a) and (b)
• D. (b) and (c)

Answer 1

Answer: (D)

In urochordata, notochord is present only in larval tail. In adults, notochord is absent.
• Chordata is divided into $3$ subphyla—Urochordata, Cephalochordata and Vertebrata.