Where are B-cells and T-cells formed? How do they differ from each other?

To which category of cells do the B-cells and T-cells belong? How do they differ from each other with reference to their formation and responses to antigens?

What are primary and secondary cell? How do they differ from each other?

Name the isotopes of hydrogen. How do they differ from each other?

How do axon and dendron differ from each other?

What are two types of lyphocytes? How they do differ from each other?

How do axon and dendron differ from each other.

Both B and T-cells are formed from

How do pisces and tetrapods differ from each other?

How do pisces and tetrapods differ from each other?