A Guide to Unicellular Organisms
Not all organisms work the same way. There are many creatures in our world whose bodies are just 1 cell.
5-Minute Crafts is going to tell you about the different kinds of unicellular organisms.
What a unicellular organism is
As you can deduce from the term, a unicellular organism is an organism consisting of a single cell. The cell performs all the basic processes that all living creatures do: nutrition, reproduction, digestion, and excretion.
Most unicellular organisms are microscopic in size and not visible without special equipment. But some of them can form colonies that can be seen with the naked eye.
Types of unicellular organisms
Unicellular organisms can be split into 2 big groups: prokaryotes and eukaryotes.
Prokaryotes (most unicellulars are this type) are organisms that don’t contain a nucleus. Their DNA is freely in the cytoplasm. These cells easily adapt to environmental conditions and can use organic and non-organic compounds to support their metabolism. Archaea and bacteria are prokaryotes.
Eukaryotes can be unicellular and multicellular. Their cells contain a nucleus that stores the DNA and organelles that perform different functions. Eukaryotes are fungi, protists, protozoa, and algae.
Kinds of unicellular organisms
- Bacteria are some of the most abundant unicellular organisms in the world. They are prokaryotic cells, which means that they are simple, unicellular organisms that lack a nucleus and membrane-bound organelles. Different types of bacteria will have structures like the flagellum, pili, biofilm, cell wall, and a capsule, among others.