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Juliette [100K]
3 years ago
12

PLSS HELP ME WITH THIS IMMEDIATELY!!! ILL MARK U BRAINIEST IF U DONT LEAVE A LINK OR GUESS!!

Biology
2 answers:
snow_tiger [21]3 years ago
4 0

Answer:

Number 2

Explanation:

LiRa [457]3 years ago
3 0

Answer:

the 2nd one i believe

Explanation:

hope this helps :)

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The student who caught the cold caused by this specific Rhinovirus was exposed to the exact same Rhinovirus 18 months later. Memory B cells of the immune system will protect her from getting the same cold again.

In immunology, a memory B cell (MBC) is a type of B lymphocyte that forms part of the adaptive immune system. These cells develop within germinal centres of the secondary lymphoid organs.

Memory B cells circulate in the blood stream in a quiescent state, sometimes for decades. Their function is to memorize the characteristics of the antigen that activated their parent B cell during initial infection such that if the memory B cell later encounters the same antigen, it triggers an accelerated and robust secondary immune response.

Memory B cells have B cell receptors (BCRs) on their cell membrane, identical to the one on their parent cell, that allow them to recognize antigen and mount a specific antibody response.

Learn more about memory B cell here : brainly.com/question/23423029

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timurjin [86]
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3 years ago
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2. Biotic factor that can affect the size of a population in a specific ecosystem:
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What does the specific defense of the immune system use to fight pathogens.
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A

Explanation:

i got it right

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