I believe the answer is B. <span>The antibodies on B cells bind to the antigens on the pathogen's surface.
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Advantage: Dichotomous keys are very useful because they allow non-expert users to identify organisms by directing them to look at the known, important organisms. Disadvantage: Disadvantage of dichotomous keys is that if a single wrong decision is made at any juncture, a wrong identification will result. Sometimes it becomes obvious that an error has been made, and you can retrace your steps until you get back on the right track, but this is not always the case
Mmmmmm mercury sexiest planet thanks for the pic
Answer:
some molecules pass
Explanation:
The ability of a membrane to pass or not to pass a substance is its permeability (permeability).
Permeability is, in fact, the ease with which a dissolved particle passes through the membrane, which depends on both the properties of the particles and the properties of the membrane itself.
The membrane is semipermeable (semipermeable) or selectively permeable because it does not permeate all molecules.
