Answer:
H2 is molecular hydrogen.it is a molecule of hydrogen that consists of two hydrogen atoms bonded together by one single bond. 2H denotes two moles of elemental hydrogen.it should be noted that elemental hydrogen is not bonded to anything.
<span>Human immunodeficiency virus or better known as HIV disables the immune system </span>
I’m not sure what level science this is but I believe the answer is (b) the person was sick from a virus and developed innate immunity
It’s main purpose is to protect the cell from its surroundings
