Matching Pairs Levels of OrganizationOnline version Match the level of organization with its definition by Anna Fox 1 A part of a cell that does a specific job. 2 A group of organs that work together to perform specific functions. 3 A single individual or living thing 4 The basic building block of matter 5 The basic unit of life 6 Multiple organisms of the same species that live in the same area 7 A group of cells that perform a specific function 8 Multiple atoms bonded together 9 A group of tissues in a living organism that work together to perform a specific function.