Answer:
1.1 that's 1 in 7 and it's most common in adolescents
Answer:
T cells and B cells
Explanation:
It is characterized by specificity, immunological memory, and self/nonself recognition. The response involves clonal selection of lymphocytes that respond to a specific antigen. T cells and B cells are the two major components of adaptive immunity.
Yes, that's possible, but highly unusual.
D, convection. It causes less dense material to rise and denser material to sink.
Some neurons have a fatty layer covering called MYELIN SHEATH around their axon. This layer is not continuous and the gaps are called NODES OF RANVIER.
Because the myelin sheath is made up of insulating fatty substances, the nodes of ranvier allow the fast transmission of electrical impulses along the axon.
