| A | B |
|---|
| Auxin | plant hormone that causes plant leaves and stems to exhibit positive phototropisms |
| Chlorophyll | green, light- trapping pigment in plant chloroplasts that is important in photosynthesis |
| Day neutral plant | plant that doesn’t require a specific photoperiod and can begin the flowering process over a range of night lengths |
| Long day plant | plant that generally requires short nights- less than then to 12 hours of darkness- to begin the flowering process |
| Photoperiodism | a plant’s response to the length’s of daylight and darkness each day |
| Photosynthesis | process by which plants and many other producers use light energy a simple sugar from carbon dioxide and water and give off oxygen |
| Respiration | process by which producers and consumers release stored energy from food molecules; series of chemical reactions used to release energy stored in food molecules |
| Short day plant | plant that generally requires long nights- 12 or more hours of darkness- to begin the flowering process |
| Stomata | tiny openings in a plant’s epidermis through which carbon dioxide, water vapor, and oxygen enter and exit |
| Tropism | positive or negative plant response to an external stimulus such as touch, light, or gravity |
