Answer:its " with monitoring, the concentration of every pollutant has decreased."
Explanation: just took it on Ap3x
Answer:
leukocyte
Explanation:
leukocyte is the organelle missing in the red blood cell.
D the expansion of their territory
Answer:
Self-antigens are not recognized and attacked by the T cells.
Explanation:
In immunology, the antigens are those substances which are bound by the antibodies. The antigens can be originated from within the bodies, known as self antigens or from outside the body, known as non-self antigens. The immune system identifies and attacks non-self invaders or the foreign harmful objects present in the body. It does not attack the self-antigens under the normal conditions. This is due to the negative selection of T cells of the thymus.
