| A | B |
| biological molecule | chemical compound that provides physical structure and brings about movement, energy use and other cellular functions |
| biology | the scientific study of living organisms and their interactions with the environment |
| cell | the smallest unit that can perform all life processes |
| multicellular | a term that describes a tissue, organ, or organism made up of many cells |
| unicellular | term that describes an organism that consists of a single cell |
| organ | a collection of tissues that carry out a specialized function of the body |
| tissue | a group of similar cells that perform a common function |
| organelle | one of the small bodies that are found in the cytoplasm of a cell and that are specialized to perform a specific function |
| organization | the high degree of order within an organism's internal and external parts and in its interactions with the living world |
| organism | any living thing that can carry out life processes independently |