‘Pathogens' are
Substances produced against any disease causative
Chemical substances produced by the host cells to kill the parasite animal
Disease spreading factors
Cells which kill the parasites
Lymphocytes are seen in large numbers at sites of inflammation because
Select the incorrect statement with respect to acquired immunity.
Thymus is the site for the development and maturation of
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 |
$A$ $B$ $C$ $D$
Write in details about Thymus.