Animal KingdomHard
Question
Which one of the following is not a characteristic of phylum - Annelida ?
Options
A.Closed circulatory system
B.Segmentation
C.Paeudocoelom
D.ventral nerve cord
Solution
Name of the phylum Annelida was first coined by Lamarck. The body of anneids is elongated, bilateraly symmetrical, Triploblastic, truely coelomate and metamerically segmented into similar metameres. The coelom is true, schizocoelous. Blood vascular system is closed. The nervous system is with a pair of cerebral genglia and a double ventral nerves in each segment.
The blood vascular system consisting of blood vessels and capillaries. Blood is composed of fluid plasma and colourless corpuscles, physiologically comparable to the leucocytes of verte brates.
Pseudocoelom is thebody cavity of Aschelminthes.
The blood vascular system consisting of blood vessels and capillaries. Blood is composed of fluid plasma and colourless corpuscles, physiologically comparable to the leucocytes of verte brates.
Pseudocoelom is thebody cavity of Aschelminthes.
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