Don't trust me on this one, but i'll say d.
All you need is to locate an artery. theres one by your neck, on the the far sides of your wrists, between your thighs, or you could just feel your own heart.
The prokaryotic cell does not have a nucleus but instead they have a chromosome.<span />
The process by which oxygen is taken to the lungs is called Inhalation or Inspiration.
