One medical reason is diabetes and those who need food or else they faint. Diabetes need a balanced diet in SUGAR, and just like me, there are people, (I don't know what the sickness is called), who need a lot of food to eat and water to drink or else they start to get dizzy and fainnt. So that's why balanced diets vary.
The supply of ATP in your cells would decrease. Not enough energy would be able to be supplied to your cells.
Nucleus for what?
Atom? Animal Cell? Plant Cell? Each have different structures.
Liver problems. Failing liver. Something with the hippocampus getting smaller, which will cause your memory to leave you.
B) Genotypes are directly selected
