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