A. Vibrating the wings.

B. Vibrating a resonant membrane.

C. Striking the substrate.

D. Rubbing body parts together.

A. Are generally known as sclerites.

B. Are found only at the joints.

C. Lack a well-defined exocuticle.

D. Contain high concentrations of quinones.

A. Thoracic muscles that move the wings.

B. A structure on the pretarsus. 

C. The innermost layer of the epicuticle.

D. A muscular pump that sucks food into the mouth

A. pine 

B. Apodeme 

C. Gland 

D. Seta

A. Genab

B. Occiputc

C. Clypeus

D. Labium

A. Chorion

B. Serosa 

C. Amnion 

D. Periplasm

A. Prothorax

B. Mesothorax

C. Metathorax

D. None of these

A. Predatory                   

B. Wingless

C. Ectognathous               

D. Hemimetabolous

A. Hemiptera 

B. Odonata

C. Phasmida

D. Thysanoptera

A. Siphonaptera

B. Hymenoptera

C. Thysanoptera

D. Neuroptera