chemicals that are secreted from antigen-presenting cells then activate helper T cells describes the role of cell-to-cell communication during a response to an invasion of antigens.
Explanation: Antibodies are present on the surface of the cells, and binds specifically to antigens and can also engulf pathogen and process these cells presenting them to MHC class 2. This complex is activated by helper T cells to secrete antibodies and macrophages. This interaction of B-cell and MHC class 2 complex with helper T cell is cell-mediated immune response.
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The answer to the raisin question is B. When a raisin is put in water, the water passes through the semipermeable membrane and causes it to swell.
You didn't put the question for the second set of answers though, if you tell me the question I'll gladly answer it for you. :)
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Is this a question? I don't understand
Explanation:
Answer:
to prevent food poisoning and to prevent food decay
mark me brainliest
. excess water on<span> the </span>slides will<span> boil </span>during fixation<span>. Why should </span>you<span> be careful . </span>During<span> the</span>performance<span> of the </span>simple staining procedure<span>, </span>you failed<span> to </span>heat fix your E<span>. </span>coli smear preparation.Upon microscopic examination<span>, how </span>would you expect<span> this </span>slide<span> to </span>differ<span> from the </span>correctly prepared slides<span>? When </span>heat fixing<span> the.</span>
