DownAnd0ut wrote:I've heard of some scientists that consider viruses living. Although I know most don't, since they only have RNA and lack DNA and the ability to reproduce on their own
They're kinda freakish, pesky little buggers, aren't they?
Viruses? - Yeh, they're pesky alright and, actually, they can have either DNA or RNA (HIV is one that happens to have RNA). You're right too in that they cannot reproduce on their own - That's what disqualifies them from the living. They also don't feed on anything or require energy.
A Bacterial cell is on average 1,000 times smaller than a human cell; viruses then are roughly 1,000 times smaller than Bacterial cells! Some viruses even attack Bacteria themselves!
Also - another interesting fact - antibiotics are not effective against viruses at all.