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Structural Organisation in Animals
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Breathing and Exchange of Gases
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  1. In which of the following, haemocyanin pigment is found?
    1. Mollusca
    2. Annelida
    3. Echinodermata
    4. Lower chordata
Correct Option: A

Haemocyanin is the pigment carrying O2 in molluscs. Annelids have erythrocruosin.


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