| A | B |
|---|
| tissue | a group of similar cells that work together to perform a specific job in the body |
| organ | a combination of 2 or more tissues that work together |
| organ system | a group of organs working together to perform body functions |
| organism | anything that can independently carry out life processes |
| unicellular | made of a single cell |
| multicellular | made of many cells |
| population | a group of individuals of the same species that live together in the same area at the same time |
| community | all of the populations of different species that live and interact in an area |
| ecosystem | a community of organisms and their nonliving environment |
