Answer:
The correct answer would be "T-lymphocytes would bind self-antigens".
Negative selection of T-lymphocytes takes place in the cortico-medullary junction in the thymus.
It removes T-lymphocytes which show high-affinity binding with self-antigen. Thus, it helps in introducing self-tolerance in T-lymphocytes.
In absence of negative selection, T-lymphocytes which show high-affinity binding for self-antigen would survive and develop into mature T-lymphocytes.
Consequently, T-lymphocytes would able to bind to self-antigens of the body which can result in autoimmune disease.
Lungs take in gas from the Atmosphere, where the Oxygen is diffused into the blood cells, which take the Oxygen to different organs/places that need it. . .
Gills take in dissolved oxygen from the water, and then use diffusion like lungs.
