Q. 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.
A) (c) and (a)
B) (a) and (b)
C) (b) and (c)
D) (d) and (c)
Explanation
[Solution] In urochordates the notochord is present only in the larval tail, and Hemichordata is not a subphylum of Chordata. (b) and (c) are true. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.