what are the differences between bacteria, virus and germs?

Answer 1

Bacteria are one-celled organisms. They can procreate independently by splitting. They're biologically alive, and they can be killed with antibiotics.

Viruses are not complete cells, they're microscopic particles - basically, a bit of DNA in a shell. They infect body cells and modify them so those cells will produce copies of the virus - they cannot procreate without a host cell. They also do not respond to antibiotics, though often if you have a virus infection, you'll be given some anyway to prevent opportunistic bacteria from taking advantage of your weakened immune system.

"Germs" is just an everyday-language term that can mean both bacteria and viruses.

Answer 2

Bacteria are single celled prokaryotic organisms, and do not have a nucleus. As the previous answer said, they reproduce by mitosis - they divide in two.

Viruses are obligate intracellular parasites that have a genome, either DNA or RNA, inside a protein coat. They can only "live" inside cells - either animal, plant or bacteria.

Germs includes both of these above, and other things like yeast (which are eukaryotes and not bacteria), and amoeba.

Answer 3

The other answers are correct, but here is something simpler...

Bacteria are microscopic plants.
Protozoa are microscopic animals.
Viruses are segments of either DNA, or mRNA (retroviruses), that hijack a living cell and force it to make more viruses.