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  •  Cyclostomata have an elongated body bearing  6 - 15 pairs of gill slits which help inOptio

 Cyclostomata have an elongated body bearing  6 - 15 pairs of gill slits which help in

Option: 1

Respiration


Option: 2

Digestion


Option: 3

Excretion


Option: 4

All of these


Answers (1)

best_answer

 

 

Class Cyclostomata - Characteristics Features -

  • This class includes the most primitive vertebrates, the lampreys and hagfishes.
  • Hagfishes are scavengers and lampreys are ectoparasite.
  • They have a sharp, circular jawless mouth with horny teeth.
  • They have a slender eel-like body.
  • They do not have paired fins.
  • The cranium and vertebral column are made up of cartilage.
  • They have closed circulatory system with two-chambered heart.
     

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Gill slits help in respiration.

Posted by

Anam Khan

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