Question

Which of the following statements are true for phylum Chordata?
a. In cephalochordates, notochord extends from head to tail and it is present throughout their life
b. All vertebrates are chordates but all chordates are not vertebrates
c. Central neural system is dorsal and solid
d. Chordates are divided into two subphyla, Agnatha and Gnathostomata

• 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

Phylum Chordata is divided into 3 subphyla - Urochordata or Tunicata, Cephalochordata and Vertebrata. In chordates, central neural system is dorsal and hollow.