permalink definition. a link to a specific article in the archives of a blog, which will remain valid after the article is no longer listed on the blog's front page (i.e after i # Home â¢ Dictionary
Unicellular organisms are composed of a single cell. Multicellular organisms are composed of many specialized cells. Specialized cells differ in structure (size, shape...) and function (the role they perform in the organism).
A multicellular organism is actually an aggregation of cells. Here a group of cells functions in a same way to form a tissue or an organ (Example: Xylem vessels, cork cells, cells in the skin). Multicellular organisms have a great capacity to survive than unicellular organisms.