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Question

Blood pigment of annelids is:

A
Haemoglobin
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B
Cyanin
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C
Haemanin
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D
Haemocyanin
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Solution

The correct option is A Haemoglobin
  • In most Annelida species the circulatory system is closed.
  • The blood usually contains hemoglobin, a red oxygen-carrying pigment; some annelids have a green oxygen-carrying pigment, and others have unpigmented blood.
  • The circulatory system is usually closed, i.e., confined within well-developed blood vessels in some polychaetes and leeches the circulatory system is partly open, with blood and coelomic fluid mixing directly in the sinuses of the body cavity.
  • So, the correct answer is option A.

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