The chloroplast is the part I believe.
Answer: 1. The adaptive immune response can recognize and respond to an almost limitless array of antigens
Explanation: part of the immune response depends on the antibodies that our body has. These antibodies can recognize antigens which are molecules in the surface of the pathogens, attach to them and destroy or block the harmful effects of pathogens.
Adaptive response allow to the cells of the immune system to develope and synthesize new antibodies. This is helpful because cells can recognize different pathogens, attack them and increase the immunological response of the body or even attack different pathogens at the same time.
