An Oil-Water Mixture Works as an Insecticidal Spray Against Mosquitoes

Question

An oil-water mixture works as an insecticidal spray against mosquitoes and other insects because it
A) coats their lungs.
B) blocks the openings into the tracheal system.
C) interferes with gas exchange across the capillaries.
D) clogs their bronchi.
E) prevents gases from leaving the atmosphere.

Accepted Answer

The oil-water mixture creates a film that blocks the openings into the tracheal system of the insects, thereby causing suffocation and death. It does not directly affect the lungs, capillaries, or bronchi. Option E is completely unrelated to the topic.