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Which of the following statement is correct about Cyclostomata?

Options

  1. AMembers possess 6-15 gill slits.
  2. BMouth is suctorial without jaws.
  3. CAmbyostoma is one of the example.
  4. DAll of the above.

Correct answer

B. Mouth is suctorial without jaws.

Step-by-step solution

Mouth is ventral, suctorial and circular (the tongue is with denticles) hence, the class is called Cyclostomata (Gk, cyklos-circular; stoma-mouth). They have a sucking and circular mouth without jaws. All living members of Cyclostomes are ectoparasite on some fishes. 5-16 pairs of gills are present in lateral sac-like pouches of pharynx, while gill-slits are 1-16 pairs. The male salamanders (genus Ambystoma) are a group that are endemic to North America.

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