The answer I believe is number 1
DNA
Nucleic Acids are the basis for the storage and transmission of hereditary information in all cells. Determines a cell's function and manufactures proteins & enzymes. Encodes instructions for making proteins and RNA. DNA stores the “operating instructions” for a cell.
<span>Most of the nitrogen gas in Earth's atmosphere comes from _____.
</span>
<span>
D. the breakdown of carbon dioxide</span>
Around 1 billion nerves reside in your body! The nerve cells unlike many other types of cells does not perform mitosis resulting in paralyzation. :)
“Diffusion sees molecules in an area of high concentration move to areas with a lower concentration, while osmosis refers to the process by which water, or other solvents, moves through a semipermeable membrane, leaving other bits of matter in its wake.”
Reference: sciencing.com
Hope this helps! :)