<span>vaccine
The wording given is pretty much the exact definition of a vaccine. The key to how a vaccine works is that it provides to the immune system, samples of the surface proteins of the infectious materials. With those samples available, the immune system is able to produce antibodies that react to those proteins.</span>
47) A) <span>Metaphase
48) C) </span><span>manufacturing proteins
49) B) Sperm and Egg cells
Hope this helps!</span>
The correct answer is: Galaxies in the universe are moving away from the earth.