Question

In general, insects respire through

• A. Green glands
• B. Malpighian tubules
• C. Tracheal tubes
• D. Stomodeal valves

Answer 1

The correct option is C Tracheal tubes

Air enters the respiratory system of most of the insects through a series of openings called as spiracles. These external openings, which act as muscular valves in some insects, lead to the internal respiratory system, a densely networked array of tubes called as tracheal tubes.
Therefore, the correct answer is option C.