Match the following columns
Column $-I$ | Column $-II$ |
$(A)$ Physical barriers | $(1)$ Interferon |
$(B)$ Physiological barriers | $(2)$ Leukocytes |
$(C)$ Cellular barriers | $(3)$ Tears |
$(D)$ Cytokinin barriers | $(4)$ skin |
$A$ $B$ $C$ $D$
$3$ $2$ $1$ $4$
$2$ $1$ $4$ $3$
$1$ $4$ $3$ $2$
$4$ $3$ $2$ $1$
The immunity obtained after the body has recovered from a disease is
Acquired Immunity mediated by which of the following
In the figure, structure of an antibody molecule is shown. Name the parts $A,\,B$ and $C$. Show $A,\,B$ and $C$ in the diagram.
An antibody is
Given below are two statements :
Statement $I$ : Bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced.
Statement $II$ : Both bone marrow and thymus provide micro environments for the development and maturation of T-lymphocytes.
In the light of above statements, choose the most appropriate answer from the options given below :