Each and every living being on this planet is made up of cells, based on the number of cells they are classified into two major categories;
1. Unicellular Organisms
2. Multicellular Organisms
Here is the list of differences between unicellular and multicellular organisms in detail.
As we seen above main difference between unicellular and multicellular organisms in number cells, read on to learn more difference between these organisms;
Unicellular organisms are living things that are made up of single cells. The existence of unicellular organisms are the oldest organisms of life. The first 3 billion years of earth only has unicellular organisms. Bacteria, amoeba, Paramecium, archaea, protozoa, unicellular algae, and unicellular fungi are examples of unicellular organisms. Most unicellular organisms are microscopic and cannot be seen with the naked eye. Most of the unicellular organisms for prokaryotes.
Examples of Unicellular Organisms
1. Amoeba: Unicellular eukaryote
2. Paramecium: Unicellular protozoan
3. Euglena: Photosynthetic unicellular organism
4. Yeast: Unicellular fungus
5. Bacteria: Unicellular prokaryotic organisms
6. Chlamydomonas: Unicellular green alga
Organisms which have more than one cell in their bodies are called multicellular organisms. The term multi means more than so technically all organisms that have more than one cell are multicellular organisms.
Multicellular organisms are very commonly eukaryotes. Multicellular organisms have different cells, each becoming specialized in doing one specific function. This is known as cellular specialization. These different types of cells work together to maintain a proper function of the organism. Examples of multicellular organisms include humans, animals, plants, and most fungi.
1. Unicellular Organisms
2. Multicellular Organisms
Here is the list of differences between unicellular and multicellular organisms in detail.
Difference Between Unicellular And Multicellular Organisms
As we seen above main difference between unicellular and multicellular organisms in number cells, read on to learn more difference between these organisms;
| Unicellular Organisms | Multicellular Organisms |
| Made up of a single cell | Made up of many cells |
| Have a simple body structure | Have a complex body structure |
| A single cell performs all life processes | Different cells perform different functions |
| The whole cell is exposed to the environment | Only the outer cells are exposed to the environment |
| Division of labour occurs between cell organelles | Division of labour occurs between cells, tissues and organs |
| Include both prokaryotes and eukaryotes | Mostly eukaryotic |
| Cell differentiation is absent | Cell differentiation is present |
| Can be autotrophs or heterotrophs | Can be autotrophs or heterotrophs |
| Mostly microscopic | Mostly visible to the naked eye |
| Usually have a simple level of organization | Have specialized cells and a higher level of organization |
| Growth mainly occurs by an increase in cell size | Growth mainly occurs by an increase in cell number and size |
| Reproduction is mainly asexual | Reproduction can be sexual or asexual |
| Examples: Bacteria, Amoeba, Paramecium and yeast | Examples: Humans, animals, plants, birds and insects |
What is Unicellular Organisms
Unicellular organisms are living things that are made up of single cells. The existence of unicellular organisms are the oldest organisms of life. The first 3 billion years of earth only has unicellular organisms. Bacteria, amoeba, Paramecium, archaea, protozoa, unicellular algae, and unicellular fungi are examples of unicellular organisms. Most unicellular organisms are microscopic and cannot be seen with the naked eye. Most of the unicellular organisms for prokaryotes.
Examples of Unicellular Organisms
1. Amoeba: Unicellular eukaryote
2. Paramecium: Unicellular protozoan
3. Euglena: Photosynthetic unicellular organism
4. Yeast: Unicellular fungus
5. Bacteria: Unicellular prokaryotic organisms
6. Chlamydomonas: Unicellular green alga
What is Multicellular Organisms
Organisms which have more than one cell in their bodies are called multicellular organisms. The term multi means more than so technically all organisms that have more than one cell are multicellular organisms.
Multicellular organisms are very commonly eukaryotes. Multicellular organisms have different cells, each becoming specialized in doing one specific function. This is known as cellular specialization. These different types of cells work together to maintain a proper function of the organism. Examples of multicellular organisms include humans, animals, plants, and most fungi.