<span>The answer to this question would be: a. dying off.
Parkinson's disease is caused by the cell in the substantia nigra of the midbrain is dying one by one. This cause a decline of dopamine produced, make the motoric movement become harder. The reason why the cell die is not well understood, so the treatment is more focused on increasing dopamine transmitter in the brain.</span>
Nucleic acids.
Macromolecules made out of units called nucleotides, come in two naturally occurring varieties: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material found in living organisms, all the way from single-celled bacteria to multicellular mammals like you and me.
C photic zone because that is where sunlight can reach and you need sun for photosynthesis
All bases shift over one space after the insertion