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