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What is the smallest unit of living systems?

This question is vague therefore I have provided two answers and explanations. The single cell is the smallest living unit within a living system. Quarks are the smallest particles of matter and atoms which composes all living things.


Is an animal a living thing or non living thing?

An animal is a living thing.


What is the smallest group of living things?

The smallest living things depend on how a living thing is defined. Some biologists do not believe viruses are living organisms because there are no free living forms (all are parasitic) and because they must reply on their host for reproduction. Others believe that, despite this, they have an existence of their own separate to the host and are subject to natural selection and are therefore alive. If you accept viruses are not alive, the smallest living things would be amongst the bacteria or protists. Bacteria are single celled organisms with no cell nucleus while protists have a nucleus. Generally the bacteria are slightly smaller but their sizes overlap. If you accept that viruses are alive, the smallest group are the Parvoviruses between 18 and 26 nanometres. These are single stranded DNA viruses. 1 nm = 1/1000000000 metres or 0.000039 inches.


Are pencils a living thing?

If it was a living thing when you use your pencil it would cry and scream that you are hurting it. I can’t imagine what it would do in a pencil sharpener as a living thing.


Is the smallest living organism?

I think currently the smallest living organisms are thought to be "viroids", which are smaller than viruses. Scientists are still figuring out exactly what viroids are, and do, but they are able to replicate, which means they are life.

Related Questions

What is the smallest unit of a living organism or nonliving thing?

The cell is the smallest living thing and an atom is the smallest non-living thing.


What is the smallest living thing that microbiology will study?

what is the smallest living thing microbiology will study


What is the smallest part of living thing that can carry out life process?

A cell is the smallest part of a living thing that can carry out life processes.


Why isn't a flea the smallest living thing?

Because a flea is made up of cells, and cells are living things. So the smallest living thing is a cell.


What is a word for the smallest part of a living thing?

Smallest block that makes up a living thing is the cell, although some debate that virus, which is much smaller than a cell, is a living thing.


World's smallest living thing?

Bacteria


What is the smallest scructure of a living thing?

cells


The smallest living thing that contains a nucleus is called what?

The atom is the smallest unit containing a nucleus. However, this is not considered living. The smallest living thing in the world (besides viruses) are a parasitic Bacterium called Mycoplasma Gallicepticum.


Is an atom the smallest living thing?

No, the atom is not because its not even living


The smallest unit of structure and function a living thing?

The Cell ....


What is the smallest part of a living thing that carries out actions that keep the thing alive?

a cell


What is the smallest unit of a living thing that can preform all life processes?

The smallest unit of a living thing that can perform all life processes is a cell. Cells are the basic structural and functional units of all living organisms. They can carry out essential functions such as growth, metabolism, and reproduction.