As small as about one micrometre, or a millionth of a metre, although if you count viruses as living things than can be hundreds of times smaller still.
http://en.wikipedia.org/wiki/Image:Relative_scale.svg
Above, graph of relative sizes.
probably tadpoles.
Microbiology means the study of microorganisms, which are living organisms that are too small to be seen with the naked eye.
Water and Salt.
Bacteria are considered to be living, single-celled organisms.
Cells are the smallest structural and functional units of living organisms. They are the building blocks of all living things, performing various functions to maintain life processes.
Yes, it is only true for living things that are small.
They are small living things.
'organisms' because they are living things, 'mirco-' means very small.
They are both. Microbes are just small living things which we need a microscope to see.
Microbiology
probably tadpoles.
Microbiology means the study of microorganisms, which are living organisms that are too small to be seen with the naked eye.
30
a microscope Either a microscope or a magnifying glass, depending on just how small the 'tiny living things' are.
Yes. It kills living things.
Water and Salt.
So the ecosystem can be balanced, small things eat tiny things, big things eat small things, and huge things eat big things. If tiny things didn't exist in ponds, small things would not have anything to eat then the small things would die then the big things would not have anything to eat and die, then the huge things would have nothing to eat and die, then humans would not have meat to eat and become weak and limp.