Meaning of Unicellular

What is Unicellular:

Unicellular, in biology, as the word indicates, is an organism that consists or is formed or composed of just one single cell.

Living beings are currently classified into 5 kingdoms of nature, being them: animal, plantae, fungi, protista and monera. Single-celled beings are found mostly in the Monera Kingdom, in the form of bacteria.

Unicellular organisms have prokaryotic cells, that is, cells without a cell nucleus. In this sense, they are considered primitive beings from which multicellular organisms with eukaryotic cells arise.

Most of the living beings that currently exist on Earth are single-celled beings and many are not visible to the human eye. These microscopic beings are observed for the first time by the Dutch merchant Anthony van Leeuwenhoek (1632-1723), considered the “father of microorganisms”.

According to the postulate of the cell theory of 1855 that affirms that “every cell comes from another pre-existing cell”, it is questioned where the first prokaryotic cell or unicellular organism is born. To this extent, self-replicating molecules without cells and single-celled organisms that agglomerate to function as a single organism have been studied.

See also Biogenesis.

unicellular and multicellular

Unicellular organisms are characterized by having prokaryotic cells, that is, cells that do not have a cell nucleus. These types of cells have simpler DNA and smaller ribosomes.

Unicellulars are considered the first living beings that inhabited the Earth and that evolved from prokaryotes to be eukaryotes, that is, organisms with cells with cellular or multicellular nuclei.

Multicellular organisms are those living beings that are made up of more than one cell, specialized in different functions.

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See also: Multicellular.