| A | B |
|---|
| Auxin | a 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 ten to 12 hours of darkness- to begin the flowering process |
| Photoperiodism | a plant’s response to the lengths of daylight and darkness each day |
| Photosynthesis | food-making process that takes place in the chloroplasts of plant cells, where light energy is used to produce glucose and oxygen from carbon dioxide and water |
| Respiration | 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 plants epidermis through which carbon dioxide and water vapor gases enter and leave a leaf |
| Tropism | Tropism- positive or negative plant response to an external stimulus such as touch, light, or gravity. |
