Question
Biology Question on Kingdom Animalia
Which one of the following is not a characteristic of phylum Annelida?
A
Pseudocoelom
B
Ventral nerve cord
C
Closed circulatory system
D
Segmentation.
Answer
Pseudocoelom
Explanation
Solution
Phylum annelida comprises invertebrates, which are segmented worms having cylindrical soft bodies showing metameric segmentation. These are triploblastic animals showing bilateral symmetry. A true coelom is present which is filled with coelomic fluid containing cells. Annelids are perhaps the first animals to have a true schizocoelic coelom.