In higher vertebrates, the immune system can distinguish selfcells and non-self. If this property is lost due to genetic abnormality and it attacks selfcells, then it leads to
autoimmune disease
active immunity
allergic response
graft rejection.
Definitions / Explanation : Active immunity & Passive immunity
The thymus is a lobed organ located near the $...A...$ and beneath the $...B... $ The most appropriate combination for $\mathrm{A}$ and $\mathrm{B}$ is
Which of the following immune responses is responsible for rejection of kidney graft?
Each antibody has $...A...$ polypeptide chains, $...B...$ small chains called $....C...$ chains and $...D...$ longer chains called $.E...$ chains
The antibody, therefore, is represented as $...F...$
Here $A$ to $F$ refers to