Chapter 9 Review

4. the repeating cycle of gametophyte and sporophyte structures in plants
5. stems that are softer and more flexible
6. stems that are hard and rigid
9. plants that do not bloom until the nights are longer than the critical night length
11. plants that bloom only when the nights are shorter than the critical night length
12. the male part of the flower consisting of filaments and pollen producing anthers
13. the female part of the flower consisting of the stigma, tubular style, and ovary
14. an angiosperm ovary that swells to surround and protect seeds

1. the leaflike flower part positioned outside the petals
2. a small chemical made by tissues that affects how plants grow
3. has clusters of roots
7. plants that only bloom when conditions like temperature and moisture are right
8. has one or a few main thick roots
10. a plant's growth towards or away from a stimulus