| A | B |
|---|
| biosphere | all parts of the planet inhabited by living things |
| ecosystem | the community of living things in an area, along with the non living features of the environment |
| genes | units of inherited information on each DNA molecule |
| Archaea and Bacteria domains | consist mainly of unicellular organisms |
| Eukaryotic cell | cell that contains a nucleus |
| prokaryotic cells | do not contain nuclei |
| human being | complex organism formed from a combination of cells |
| producers | use sunlight to make food (plants) |
| consumers | obtain food by eating producers and consumers (animals) |
| organism | term for an individual living thing |
| evolution | generation to generation change in the proportion of different inherited genes in a population |
| adaptation | inherited traits that help an organism to survive and reproduce in its environment |
| system | a complex organization formed from a combination of parts |
| species | a distinct form of life |
| domain | broadest category used to classify life forms |
| multicellular | term meaning "made of many cells" |
| cell | life's basic unit of structure and function |
| DNA | chemical responsible for inheritance |
| photosynthesis | the process by which plants use sunlight to make food |
| unicellular | consisting of a single cell |
| homeostasis | a steady state |
| maintaining body temperature | example of homeostasis |
| evolution | occurs at the level of population |
| natural selection | the process by which individuals with a helpful inherited trait live longer and produce more offspring than those without the trait |
| DNA is contained in the ____ | nucleus |
| An example of form related to function | structure of birds wing that allows it to fly |
| tissue | bunch of cells working together for a specific function |
| organ | bunch of tissue working together for a specific purpose |
| organ system | organs working together for a specific purpose |
| ubiquitous | existing or being everywhere at the same time : constantly encountered : widespread |
