Read each physical change in the first column in the table and think about what factors and/or biochemicals cause that change. Then click on the physical change to see if you are right.
| Physical Change | Cause of the Physical Change |
| flowering | photoperiodism, controlled by phytochromes |
| dormancy | photoperiodism, controlled by phytochromes; cold temperatures and less water |
| shedding of leaves (abscission) | lack of chlorophyll and accessory pigments due to less light |
Click the Activity Button below to access the Seasonal Changes in Plants worksheet, which will help you to understand how the seasons have an effect on plants. After you are finished, submit the worksheet to your teacher.
