The answer for that is 16, math right?
Answer:
1) Hydrogen
2) Methane
3) Carbon
4) Structural isomer
5) Ethene also known as ethylene
6) Hydrocarbons are widely used as fuel
7) Crude oil
Explanation:
B: produces energy for the cell
Viruses are not classified as being alive in because of the fact that they can't reproduce.