Biology

Difference Between Unicellular And Multicellular Organisms

As you know that the cell is the smallest structural and functional unit of an organism. There are mainly two types of organisms, divided according to the cell. Organisms that have only one cell are called unicellular, while organisms that have many cells are known as multicellular. The unicellular organism is simpler in nature, depends on the diffusion process for different functions, and has a single cell to perform the different functions of life. While multicellular organisms are more complex and have numerous specialized cells that are assigned to perform specific functions within the body.

The basic difference between unicellular and multicellular organisms is that a unicellular organism is made up of a single cell. On the other hand, multicellular organisms are made up of many cells, although they come from only one until they evolve into a set of these. In the case of unicellular organisms, its only cell works hard in the movement of the cytoplasm, in order to be able to stay alive, even despite the work that this represents, whereas multicellular organisms make all its cells work together to be able to form tissues, which in turn will form organs, which will later become complex organisms worthy of study.

What are Unicellular Organisms?

A single-celled organism is known as a unicellular organism to all those forms of life whose body is composed of a single cell, and that does not form any type of tissue, structure, or joint body with others of its kind. Unicellular organisms are the simplest and smallest of all living things, and they tend to inhabit numerous habitats, with very diverse metabolic strategies, ranging from photosynthesis to the decomposition of organic matter, parasitism, or predation from other single-celled creatures.

Characteristics Of Unicellular Organisms

  • The number of them far exceeds multicellular organisms.
  • Present in every type of ecosystem.
  • Unlike multicellular, they are considered more primitive.
  • There are heterotrophic and autotrophic unicellular organisms.
  • Their growth occurs asexually.
  • They are microscopic.
  • They are necessarily made up of a single cell.
  • They can group forming colonies.

Examples Of Unicellular Organism

  • Ameba
  • Cyanidiophytina
  • Yeast
  • Bacteria
  • Dinoflagellates
  • Paramecium
  • Arches
  • Diatomea
  • Microalgae
  • Chlorella
  • Euglena
  • Protozoa

What are Multicellular Organisms?

Multicellular organisms are composed of two or more cells that specialize in different vital functions (neurons, red blood cells, epithelial cells). These specialized cells form tissues that in turn make up the organs of the living being. Multicellular organisms initially arise from a single cell. Even human beings at the moment of conception are initially a cell. However, the cell immediately begins to multiply. Multicellular organisms obtain all cells (with the exception of sexual ones) from a single initial cell thanks to mitosis. In multicellular organisms, all cells are not the same but fulfill different functions: for example, there are nerve cells, epithelial cells, muscle cells, etc. The specialized cells are organized into groups called tissues, which in turn make up the organs.

Cells can reproduce through two processes:

  • Mitosis
  • Meiosis

Characteristics of multicellular organisms

  • They are multicellular that are eukaryotic organisms.
  • Multicellular organisms are made up of specialized cells which also differ from one another.
  • Their cells make them related to each other and need each other.
  • They are more complex and developed than unicellular organisms are microscopic organisms.
  • They multiply through meiosis or mitosis and mitosis and initially arise from a single cell.

Examples of multicellular organisms

  • Avocado
  • Brown algae
  • Horse
  • Chicken
  • Sparrow
  • Hortensia
  • Kelp
  • Dog
  • Porphyra
  • Portobello
  • Oak
  • Seta china
  • Black truffle
  • Lettuce
  • Margarita
  • Mosquito
  • Nematodes

Other Biology Differences

Related Articles

Leave a Reply

Your email address will not be published.

Check Also
Close
Back to top button