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Which of the following statement is correct about the circulatory system of Annelida?

Options

  1. ABlood contains a respiratory pigment haemocyanin
  2. BBlood contains respiratory pigment haemoglobin in RBC
  3. CThey have open type of circulatory system
  4. DThe respiratory pigment is haemoglobin dissolved in plasma

Correct answer

D. The respiratory pigment is haemoglobin dissolved in plasma

Step-by-step solution

In the circulatory system of molluscs, the respiratory pigment is copper-containing haemocyanin dissolved in plasma. In Annelida, the respiratory pigment is haemoglobin dissolved in plasma.

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