Answer: A
Explanation: Vaccines create memory cells with a weak version of the pathogen, so when they meet that pathogen again the body can respond more quickly and more efficiently since they have already been exposed to the pathogen.
Answer:
A. runoff
Explanation:
Runoff is a consequence of over fertilization.
This can be dangerous because it could cause the Mother and the babies to get disabilities or die.
A. Immune system
It helps our bodies fight everything that comes in our path.
The lymphatic system includes a network of vessels, ducts, and nodes, as well as organs and diffuse tissue that support the circulatory system. These structures help to filter harmful substances from the bloodstream. Your Welcome.
Explanation:
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