The cells which directly attack and destroy the antigens are known as
Helper $T$-cells
Killer $T$-cells
Helper $B$-cells
Killer $B$-cells
Select the correct statement from the ones given below.
Which one is a viral disease
Degenerative diseases are those which develop due to
Malaria is transmitted by ’Anopheles'. This was discovered by
During conjugation in Paramecium