Which of the Following Statements is True About the Flight

Question

Which of the following statements is true about the flight muscles of a fly?  
A) They are attached underneath the cuticle.
B) They are attached to the wings directly.
C) They pull the wings down when the vertical muscles contract.
D) They change the shape of the thorax.
E) They pull the wings up when the longitudinal muscles contract.

Accepted Answer

The flight muscles of a fly change the shape of the thorax, which indirectly causes the wings to move. This is a characteristic of indirect flight muscles found in many insects, including flies.