In crustaceans (i.e.crabs, shrimps & sea fish etc.) the metallic

base of the respiratory pigment is made up of

1 Iron

2 Copper

3 Magnesium

4 Potassium



In crustaceans (i.e.crabs, shrimps & sea fish etc.) the metallic base of the respiratory pigm..

Answer / guest

(2) Copper

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