Circulatory system in annelids
Name the kind of circulatory system existed in annelids?
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In beings of phylum Annelida the circulatory system is closed, that is, blood circulation occurs only in specialized vessels.
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What do you mean by the term antigen?
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In which division of meiotic does the separation of homologous take place? What are the ploidies of generated cells subsequent to the ending of that process?
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