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NTA Abhyas NEET2020BotanyAnimal KingdomPractice

Which of the following statements is incorrect w.r.t. class Cyclostomata?

Options

  1. AAll the members are ectoparasites on some fishes
  2. BTheir body is devoid of scales and paired fins
  3. CCirculation is of open type
  4. DThey are marine but migrate for spawning to fresh water

Correct answer

C. Circulation is of open type

Step-by-step solution

Circulatory system of class Cyclostomata is closed type. Heart is 2 chambered and is surrounded by cartilaginous capsule.

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