Question

Which of the following statement is correct about Cyclostomata?

• A. All living members are endoparasites on some fishes.
• B. They have an elongated body bearing 2 pair of gill slits.
• C. They have a sucking and circular mouth without jaws.
• D. All of the above.

Answer 1

Answer: (C)

All living members of Cyclostomes are ectoparasites on some fishes. They have an elongated body bearing 6-15 pairs of gill slits. They have a sucking and circular mouth without jaws.