The myelin sheath is the layer of fat cells that insulates most axons and speeds up the transmission of nerve impulses.
I'm almost 100% it is the first option
To prove that a certain fruit (in this case, an orange) indeed contains a certain compound (in this case, vitamin C); then the vitamin C should be extracted and isolated from the orange and must be confirmed by molecular analysis. The extraction process involves using chemicals (i.e. 6% MPA), and procedures such as centrifugation and filtration. Then the extract is stored and subjected to high-performance liquid analysis (HPLC) to measure the vitamin C content.
Oh this is easy.
Astronomy is the branch
