Answer:
Maintaining constant water and salt concentration (osmoregulation), keeping a constant temperature of the body and excreting waste substances.
Viruses are smaller than bacteria and need a living host
A gene
is something that is passed onto you, pretty much like this: My dad had blonde hair and green eyes, and that's what I got. My mom was Brown haired and blue eyes. I got her eyebrows and mouth. Get what im saying? It's something that is passed down to you.
