<span>i think it is a.Molecules move against their concentration gradient. hope it helps
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No it does not follow a pattern
A, because of evolution things are constantly changing. DNA is written with letters and we are nearly identical but yet a few chromosomes make up our differences, but everyone has the possibility of a bad bacterial causing a DNA change which completely changes our reading
Immediately, the pathogen has been recognized:
Macrophages acts as the first line of defence by engulfing pathogens identified by antigens which will now present the antibody shape to a helper T cell.
The Helper T cells produce a signal to plasma and Memory B cells to yield antibodies that attach to the antigens. The cytotoxic cells that leads to cell death are activated by the helper T cells.
Antibodies helps to immobilize pathogen for macrophage to feed on.
if the pathogen comes back a 2nd time the memory cells helps in quick and efficient recovery by producing the specific B and T cells for the antigen.
