Item CE096004: All parts of the body, including the skin and lungs, develop from a single fertilized egg cell.

Most animals start as a single fertilized egg cell.  What parts of the body can eventually develop from that single fertilized egg cell?

  1. The skin, but not the lungs
  2. The lungs, but not the skin
  3. Both the skin and lungs
  4. Neither the lungs nor the skin