What type of microscope would you use if you wanted to look inside of a virus?
transmission electron microscope
Scanning electron microscope
Compound light microscope
dissecting microscope

Electron microscopy (EM) has long been used in the discovery and description of viruses.

a axis of a graph is a color or shade so we can all go outside and have a party so we can eat   some grilled cheese sammiches and broccoli and have some ugly fun times

i don't know why i put this, i know its not the i was just bored : p

delete this answer while you can

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.