| A | B |
|---|
| transpiration | loss of water through stomata of a leaf |
| photosynthesis | process in through which plants use light energy to produce food |
| respiration | the process by which organisms break down food to release energy |
| stimulus | anything in the environment that causes a change in the behavior of an organism |
| tropism | the response of a plant to a stimulus |
| auxin | a type of plant hormone |
| photoperiodism | the lowering response of a plant to the change in the lengths of light and dark in a day |
| long-day plants | plants that require short nights to flower |
| short-day plants | plants that require long nights to flower |
| day-neutral plants | plants that are not sensitive to the number of hours of darkness |
| coevolution | occurs when two species evolve structures and behaviors in response to changes in each other |
| ethnobotany | the study of how people use plants |
