Question

EV
Which of the following sets of animals belong to class
cyclostomata?
​

Answer 1

Answer:

lamprey

and

hagfish are the best examples of cyclostomata

Answer 2

★ CLASS - CYCLOSTOMATA:-

→ Habitat - cctoparasites on some lishes. Bexly shape clongated body

→ Respiration - 6 - 15 pairs of gill slits are present.

→ Cyclostomes have a circular mouth without jaws.

→ Scales and paired fins are absent.

→ Craniuni and vertebral column are cartilaginous.

→ Circulation is of closed type.

→ Marine but migrate to fresh water for spawning.

→ After spawning, within a few days, they die.

→ Their larvac, after metamorphosis, return to the ocean.

→ Examples:- Petromyzon and Myxine.