- published: 11 Sep 2014
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Multicellular organisms are organisms that consist of more than one cell, in contrast to unicellular organisms.
All species of animals, land plants and filamentous fungi are multicellular, as are many algae while a few organisms are partially uni- and partially multicellular, like slime molds and social amoebae such as the genus Dictyostelium.
Multicellular organisms arise in various different ways, for example by cell division or by aggregation of many single cells. Colonial, or organisms are the result of many identical individuals joining together to form a colony, but pluricellular colonies have evolved independently in Volvox and some flagellated green algae that form coenobia.
In Volvox the cells comprising the colony arise by cell division and are of two different types, specialized for different functions. The approximately 2000 flagellate somatic cells forming the outer spherical shell of the colony are identical, and are similar in structure to their free-living unicellular relative Chlamydomonas, but are incapable of cell division. Reproduction in Volvox is carried out specialized cells called "gonidia" that are larger than the somatic cells, lack flagella and cannot swim, but can divide to form new colonies.
Learn about cellular organization of living things in this short educational video. Viewers will learn how to identify the prefixes in the words unicellular and multicellular and determine meaning of the words.
How oxygen enabled the development of multicellular organisms.
Learn how a unicellular organism is different than a multicellular organism. Unicellular oraganisms only have one cell, and a multicellular organism has two or more cells.
How cells, tissues, organs and organ systems give rise to organisms
Some people refuse to believe in evolution because it’s hard to understand how we evolved from a single-celled organism. Julian explains how this transition occurred. Follow Julian on Twitter: https://twitter.com/jhug00 Read More: From single cells to multicellular life: Researchers capture the emergence of multicellular life in real-time experiments http://www.sciencedaily.com/releases/2014/11/141106113334.htm “All multicellular creatures are descended from single-celled organisms. The leap from unicellularity to multicellularity is possible only if the originally independent cells collaborate.” ____________________ DNews is dedicated to satisfying your curiosity and to bringing you mind-bending stories & perspectives you won't find anywhere else! New videos twice daily. ...
Start your Audible trial today: http://www.audible.com/ok Tweet this ⇒ http://bit.ly/OKTBSmc Share on FB ⇒ http://bit.ly/OKTBSmcFB ↓ More info and sources below ↓ Check out Destin’s video on Smarter Every Day: “DEVIL FACIAL TUMOR DISEASE” https://www.youtube.com/watch?v=hol33ga9G_E “The Vital Question” by Nick Lane: http://amzn.to/1SntUdG Further reading: Bonner, J. T. (1998), The origins of multicellularity. Integr. Biol., 1: 27–36. Grosberg, Richard K., and Richard R. Strathmann. "The evolution of multicellularity: a minor major transition?." Annual Review of Ecology, Evolution, and Systematics (2007): 621-654. Parfrey, Laura Wegener, and Daniel JG Lahr. "Multicellularity arose several times in the evolution of eukaryotes" Bioessays 35.4 (2013): 339-347. Szathmary, Eors, and J...
Biology ( Grade 9): High School Learning: Unicellular Cell Organisms: - Uni=One. - Prokaryotes. - Some Algae , Some Protists , And Some Eukaryotes(Yeast) are Unicellular. - Can Do Everything so that they Stay Alive. THE AMOEBA - Basic Introduction. - How they survive. MULTICELLULAR ORGANISMS: - Start as a single celled.- Many celled- Cells Differentiate into different type of cells- Cells then group together. Occurence of Multicellular organisms. - All multicellular organism come from one cell : fertilized egg. Difference between Unicellular and Multicellular Organisms. ; Videos by Edupedia World(www.edupediaworld.com),Online Education. Click on (https://www.youtube.com/playlist?list=PLJumA3phskPH0wB23s3SD2Lnz0FbdrgjO) for more Videos.All Rights Reserved.