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NTA Abhyas NEET2020BotanyAnimal KingdomPractice

Which of the following set of animals are triploblastic, true coelomates with open type circulatory system?

Options

  1. AEarthworm, Cockroach, Nereis
  2. BCockroach, Octopus, Leech
  3. CMosquito, Pheretima, Nereis
  4. DCockroach, Leech, Pila

Correct answer

D. Cockroach, Leech, Pila

Step-by-step solution

Open circulatory system also called Haemocoel is present in Arthropoda- Cockroach, mosquito, honey bee, etc. Hirudinaria of Annelida -Blood sucking Leeches. Non-cephalopode Molluscs- Pila, Unio, Dentalium

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