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