Question

The main difference between Urochordata and Cephalochordata is

• A. Position of endostyle and dorsal lamina
• B. Perforated pharynx
• C. Length of notochord
• D. All of the above

Answer 1

Answer: (C)

Length of notochord

Cephalochordates are Urochordates are marine organisms. In the members of the cephalochordates, the notochord is persistent. The notochord is present throughout the body. In case of the members of the Urochordates, the notochord is present in posterior half of the body of the organism. Thus, the organisms in the two groups are divided on the basis of the length of notochord.

Thus, the correct answer is option C.