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If they're not using their cell, I'm not sure what else they would be using. There's only one cell to be used.

If you're asking whether there is a "breathing mechanism" within the cell, then the answer is no. Unicellular organisms don't need an extensive respiratory system like multicellular organisms. Moreover, unicellular organisms couldn't "breathe" because no organelle supports such a thing.

Instead, unicellular organisms get oxygen just through diffusion. Because unicellular organisms are small, the diffusion of oxygen into the cell is sufficient for cell respiration. In contrast, larger multicellular organisms can't obtain oxygen through diffusion alone because the oxygen couldn't "get" to every cell.

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Related Questions

What type of cell make up unicellular organisms?

Eukaryotic cell make up unicellular organisms.


What is an organism called with one cell?

unicellular


A sentence with the word unicellular?

The word unicellular is used to describe organisms that are made up of only a single cell. An example of a sentence using the word would be: Most Protista are unicellular organisms.


Organisms are made of only one cell?

They are unicellular organisms. Bacteria, protozoans and certain fungi are unicellular.


Organisms composed of a single cell are?

unicellular.


What have only 1 cell?

unicellular organisms


What are most unicellular organisms called?

Cell


What about unicellular organisms?

unicellular can live with one cell. Now u know


What is the body form unicellular or mullticellular?

Unicellular organisms contain just one cell, example: amoeba, bacteria. Multicellular organisms are made up of more than one cell which includes everything other than the unicellular organisms.


Do unicellular organisms development?

Unicellular organisms develop, but only their one cell, and getting bigger. That is pretty much all the developing a unicellular organism will do.


How are unicellular different from multicellular?

Unicellular organisms are made up of a single cell, whereas multicellular organisms are made up of multiple cells. Unicellular organisms are typically microorganisms like bacteria and protists, while multicellular organisms can range from simple organisms like sponges to complex organisms like humans. Multicellular organisms have specialized cells that perform specific functions, allowing for division of labor within the organism.


Which cell usually form unicellular organisms?

The cell that usually forms unicellular organisms is the single-celled organism itself. Examples of unicellular organisms include bacteria, yeast, and amoebas, each of which consists of a single cell that carries out all necessary functions for survival independently.