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Characterstic Features of Cyclostomata MCQ - Practice Questions with Answers

Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET

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  • Class Cyclostomata - Characteristics Features is considered one of the most asked concept.

  • 16 Questions around this concept.

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Which one of the following pairs of animals comprises 'Jawless fishes'?

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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 and scales
  • They have an elongated body bearing 6-15 pairs of gill slits
  • The cranium and vertebral column are made up of cartilage.
  • They have closed circulatory system with two-chambered heart
  • Cyclostomes are marine but migrate for spawning to fresh water. After spawning, within a few days, they die.
  • Their larvae, after metamorphosis, return to the ocean.

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Class Cyclostomata - Characteristics Features

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