Question

Which of the following statements is not true?
A. In Urochordata, the notochord is present only in the larval tail.
B. In Cephalochordata, notochord extends from head to tail region.
C. Branchiostoma belongs to Hemichordata.
D. Only one class of living members, class Cyclostomata represents the Superclass Agnatha.

• A. A, B and D only
• B. C, D and A only
• C. C only
• D. A and D only
• E. C and D only

Answer 1

The correct option is C C only

• In the members of Urochordata, the notochord is present only in the larval stage in the tail.
• In the members of Cephalochordata, the notochord extends from the head-to-tail region. The notochord remains persistent in these animals throughout their life.
• Branchiostoma is a cephalochordate. It does not belong to the group of Hemichordata.
• Superclass Agnatha has only one class Cyclostomata. It is the group of chordates that contain the fishes without jaws.
  

Thus, the correct answer is option C.