https://www.khanacademy.org/science/ap-biology/cell-structure-and-function/cell-structures-and-their-functions/v/introduction-to-the-cell 2024-05-06T19:22:43.24334365Z Introduction to the cell Cells are the most basic unit of life. All cells have a membrane that separates them from the outside world. Although cells are small, they are not simple. Cells contain different components, such as the cytoplasm, ribosomes, and genetic information in the form of DNA. Sal Khan video https://cdn.kastatic.org/googleusercontent/oJzMb8uFcN9RVSjYAzgspVKaATNhy5W3RvgP7f7VURoD28h2uR7JZ1EPk1bW-5e_OOUXB88nBpw0LeCg6V3APRq--w Introduction to the cell Cells are the most basic unit of life. All cells have a membrane that separates them from the outside world. Although cells are small, they are not simple. Cells contain different components, such as the cytoplasm, ribosomes, and genetic information in the form of DNA. https://cdn.kastatic.org/ka-youtube-converted/5KfHxF6Vhps.mp4/5KfHxF6Vhps.mp4 352 Importance of cells in living things https://www.khanacademy.org/science/ms-biology/x0c5bb03129646fd6:cells-and-organisms/x0c5bb03129646fd6:cells-organisms/v/ms-cells-and-organisms 2022-09-10T03:04:58.582913383Z Cells and organisms All living things are made up of cells, which is the smallest unit that can be said to be alive. An organism may consist of one single cell (unicellular) or many different numbers and types of cells (multicellular). Khan Academy video https://cdn.kastatic.org/ka_thumbnails_cache/4c87c6c9-4669-4319-91b7-935603e64401_1280_720_base.png Cells and organisms All living things are made up of cells, which is the smallest unit that can be said to be alive. An organism may consist of one single cell (unicellular) or many different numbers and types of cells (multicellular). https://cdn.kastatic.org/ka-youtube-converted/Uiqro5TUyLA.mp4/Uiqro5TUyLA.mp4 237 Importance of cells in living things https://www.khanacademy.org/science/biology/structure-of-a-cell/introduction-to-cells/a/intro-to-cells 2021-04-29T07:48:39Z Intro to cells An introduction to cells, including the history of their discovery and the development of cell theory. article https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:from-cells-to-organisms/x230b3ff252126bb6:the-cellular-basis-of-life/a/the-cellular-basis-of-life 2024-06-28T21:00:15.59562973Z The cellular basis of life Learn about what it means to be alive, and how cells are the foundational units of life. article https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:from-cells-to-organisms/x230b3ff252126bb6:the-cellular-basis-of-life/e/apply-the-cellular-basis-of-life 2026-03-25T13:00:37.369559121Z Apply: the cellular basis of life Apply your understanding of the cellular basis of life in this set of free, standards-aligned practice questions. Megan Cohn exercise https://www.khanacademy.org/science/ms-biology/x0c5bb03129646fd6:cells-and-organisms/x0c5bb03129646fd6:cells-organisms/e/understand-cells-and-organisms 2026-02-11T03:53:53.051913885Z Understand: cells and organisms Check your understanding of cells and organisms in this set of free practice questions. Khan Academy exercise