Acid rain primarily comes from compounds based on what two substances? 1-mercury and VOCs
2-carbon dioxide and methane
3-CFCs and HFCs
4-nitrogen and sulfur oxides

Nitrogen and sulfur oxides

Explanation:

I had it on a quiz

i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.