The flight muscles of many species of flies and bees
A)are indirect.
B)are asynchronous.
C)beat 100 times per second or more.
D)all of these

Question

Quizplus · Accepted Answer

The flight muscles of many species of flies and bees are indirect, meaning that they are not attached directly to the wings but rather to the exoskeleton surrounding the thorax. They are also asynchronous, meaning that they do not work in pairs but rather contract independently at high frequencies, often beating 100 times per second or more. Therefore, the best choice is D, all of these.

The Flight Muscles of Many Species of Flies and Bees