Which of the following is the distinguishing feature of a nematode?
A
Pseudocoelom and flame cells
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B
Pseudocoelom and longitudinal muscle in the body wall
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C
Flame cells and longitudinal muscle in the body wall
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D
Syncytial epidermis and diploblastic nature
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Solution
The correct option is C Pseudocoelom and longitudinal muscle in the body wall Nematodes are the roundworms, pseudocoelomate where the body cavity is not lined by mesoderm. This is the cavity between the mesoderm and endoderm and body wall contains only the longitudinal muscles.