Al-Qaeda <span>chose its first American bombing targets if t</span>he targets were in Africa, which is not far from the Middle East. The second one is your answer. I hope this is the answer that you are looking for and it comes to your help.
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.
Patterns. ...
Cause and effect: Mechanism and explanation. ...
Scale, proportion, and quantity. ...
Systems and system models. ...
Energy and matter: Flows, cycles, and conservation. ...
Structure and function. ...
Stability and change.
I wanna say the answer is cause and effect
Exploring new sources of coal depositsAnswer:
Explanation:
sry if im wrong
