Mesenteries attach parts of the digestive tract to the dorsal body wall
The correct answer is "<span>to make a safe left turn".
Accidents often occur, when other drivers are speeding and other drivers are taking precautions, which is why it is best that before making a left turn, make sure to look on the left and right before proceeding.</span>
Immunological memory refers to the ability of the immune system to react previous antigen infections.
<h3>What are primary and secondary immune responses?</h3>
The primary immune response refers to the initial interaction between the immune system with pathogenic microorganisms (e.g., bacteria).
The secondary immune responses refer to the second contact with the same pathogenic organism, which enables to the organism create specific antibodies against this pathogen through a process called immunological memory.
Active Immunity is a term used to refer to a type of acquired immunity caused by previous exposure to a pathogenic microorganism and/or vaccine inoculation.
Immunological memory leads to a faster and better response of the immune system against pathogen reinfection.
In conclusion, immunological memory refers to the ability of the immune system to react previous antigen infections.
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A virus cannot infect a host cell unless i<span>t's surface proteins fit receptor molecules on the host cells surfaces. And in order to reproduce it must first infect a host cell.
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