The basic ring structure that is common to all steroids is the four ring structure. the steroid is a type of lipid that contains four rings of carbon atoms. these four ring structure is they are derived to a polycyclic four ring. The four ring of the steroid is arranged in a very specific molecular configuration.
A cigarette lighter considering the suspect touched it and left fingerprints
You put sand in the furnace
Answer:
b. filters dirt and pollution out of the water
Explanation:
just answered the question :)