Well im in middle school and to me that looks like a skin cell breking into two cells so how i would draw that is why it would do that (cause) or how it does it. Hope it works
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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Answer:
Ecological succession refers to the changes taken place in a forest over a particular period of time.
Succession is usually influenced by environmental factors such as water regimes, soil type, climate, vegetation history, and invasive species.
Humans interventions affect all of the above-mentioned factors.
Human activities such as fragmentation of forests, clearing of forests for agricultural practices, construction of dams, civilization, logging et cetera drastically reduce the biodiversity of a forest.
This reduction of biodiversity forms the foundation for a secondary succession of a forest.
It is colder at the top of a mountain because there is less air pressure. The same amount of heat is now in a larger area so it is more spread out.
The valves in the heart make sure that blood goes in only one direction. For example, when blood is pumped from the left ventricle the mitral valve won't allow the blood to come back into the left atrium. And the aortic valve will prevent the blood from coming back into the left atrium from the aortic arch.
