Stress<span>A nonspecific response of the body to any demand put upon it that can be both physical and mental</span>
Explanation:
I'm not an expert or sum, but with using logic I would choose: DNA plays a role in the growth and reproduction of organisms, DNA guides the formation of an organism's structures.
For an atom to become a positively charged ion it must lose negatively charged electrons.
Answer:
The substance is chlororphyll
