Answer: An external factor caused damage to the nerve cells. However, the injection of new cells into the injured area prompted a beneficial change. The injured cells received proteins that decreased inflammation and pain in the mice.
The second one
One gene for a particular trait
The lysosomes<span> are the animal cell's "garbage disposal", while in plant cells the same function takes place in </span>vacuoles<span>. Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, which are not found within animal cells.</span>
That answer is A. Hopefully this helps.
Explanation:
This is an atom with a covalent bond
