Question

Which of the following statements is incorrect pertaining to coackroach?

• A. Ostic have valves which allow the blood to pass only into the heart.
• B. Thoracic and abdominal spiracles are valvular.
• C. The wall of trachea is made with lamina propria, endothelium and taenidia.
• D. The taenidia keeps the trachea always open and prevent it from collapsing.

Answer 1

The correct option is C The wall of trachea is made with lamina propria, endothelium and taenidia.

Layers in the body wall of cockroach (outer to inner)

Epicuticle→Exocuticle→endocuticle→epidermis→basement membrane

Therefore, option C is incorrect and so the correct answer is option C.