Question

Which of the following statements are true for the phylum Chordata?

(a) In cephalochordates, notochord extends from head to tail
(b) Urochordates are exclusively marine
(c) Notochord is dorsal to nerve cord
(d) All vertebrates are jawed

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

Answer 1

The correct option is A (a) and (b)

Cyclostomes are jawless vertebrates. In chordates, nerve cord is dorsal to notochord.