Answer:
C
Explanation:
Our hair follicles hold DNA just as do our finger nails, saliva, and blood.
Answer:
The one major change that occurred was the placement and organization of the electron.
You have not given the concept map. But I think it might be this one. So, according to this concept map, the answer should be B. H2O and CO2
From tiny blood cells/vessels!
Hope this helps!