| A | B |
|---|
| stimulus | any object or event that can cause a living thing to react |
| Growth Region | a tissue in a plan in which growth occurs |
| Annual Rings | rings of wood that are produced yearly in the stems of trees |
| Tropism | a plant response that involves growth |
| phototropism | the growth response of a plant to light |
| xylem | tissue made of tubes that carry water and minerals through a plant |
| phloem | tissue made of tubes that carry food through a plant |
| adaptation | a response or structure that helps a living thing survive |
| response | the reaction of a living thing to something in its environment |
