HIV causes AIDS and interferes with the body's ability to fight infections.
The virus can be transmitted through contact with infected blood, semen, or vaginal fluids.
Answer:
A law is subject to change as new evidence is discovered
It depends if you're talking about Physical Science or Physics/Biology -- so, I'll give both definitions (:
Physical Science: the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
Physics/Biology: a dense organelle present in most eukaryotic cells, typically a single rounded structure bounded by a double membrane, containing the genetic material.
Hope that helped! (:
