In mammals, histamine is secreted by
Fibroblasts
Histiocytes
Lymphocytes
Mast cells
Filarial larva can be collected from man's
If there are two pathogenic viruses, one with $DNA$ and other with $RNA$, which would mutate faster ? And Why ?
'Lock jaw' is another name of
Why is smoking cigarette injurious to health ?
The principle of sterilization is based upon experiment carried by