The projects are presented in a sequence that represents a traditional geometry course; however, they are created as independent units that do not need to follow a specific order. (gettingsmart.com)
Unlike the cells in our body, ants are still independent units with different goals and needs. (sciencemag.org)
They are generally not looking to build additional independent units because they may already have a rather high vacancy rate in that area. (nic.org)