| Across |
| 3. |
The young plant that develops from the zygote, or fertilized egg, is called the |
| 7. |
touch, gravity, and light are three important stimuli that that trigger growth in plants |
| 8. |
fertilized egg is called a |
| 11. |
is the number of hours of darkness that determines whether or not a plant will flower |
| 12. |
protects the seeds as they develop |
| 13. |
keeps the plant from injury when it grows |
|
|
| Down |
| 1. |
Next is a layer of cells called the |
| 2. |
plant's response to seasonal changes in the length of night and day is called a |
| 4. |
carries substances between the plant's roots |
| 5. |
occurs when a sperm cell unites with an egg cell |
| 6. |
helps plants survive freezing temperatures and lack of liquid water |
| 9. |
open and close to control when gases enters and leaves the leaf, and oxygen and water vapor exit |
| 10. |
is on the plant that has color |
|
