Question

Which of the following is the distinguishing features of the nematode?

• A. Pseudocoelom and flame cells
• B. Pseudocoelom and longitudinal muscle in the body wall
• C. Flame cells and longitudinal muscle in the body wall
• D. Syncytial epidermis and diploblastic nature

Answer 1

Answer: (B)

Pseudocoelom and longitudinal muscle in the body wall

Nematode includes mostly the parasite with tubular body plan. It is also known as roundworms. The body cavity of the nematode is a pseudocoelomate because the mesoderm splits incompletely and lines the body cavity which gives it an appearance of the false body cavity. All the body muscles are longitudinal in arrangement. Therefore, the correct answer is option B.