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Biology II
Plant Life History and Hormone
Study Guide
1. What are the functions of the following flower parts: sepals, petals, pistil,
stamen?
2. What are the corolla and the calyx?
3. Be able to label all of the flower parts.
4. What is another name for the megasporangia?
5. What happens to the single diploid megaspore mother cell?
6. What happens to the remaining haploid cell?
7. What is the embryo sac?
8. Where are the 8 nuclei found in the embryo sac and what happens to them?
9. What is another name for the microsporangia?
10. What happens inside the microsporangia?
11. What happens to the microspore mother cells?
12. Where do pollen grains come from?
13. What happens to the nucleus of a pollen grain?
14. What are the functions of the tube nucleus and generative nucleus?
15. What makes up the entire male gametophyte?
16. What is pollination and what is the site of pollination?
17. What is the difference between self and cross-pollination?
18. How does the tube nucleus know how to reach the ovule?
19. What happens to the 2 sperm nuclei?
20. What is this process called and what is unique about it?
21. What forms the seed coat?
22. What are the cotyledons and what is their function?
23. What are the epicotyl, plumule, hypocotyls, and radicle?
24. What is the first part of the embryo to start growing?
25. Why does the hypocotyls break the surface of the soil?
26. Give 2 reasons why dormancy is important.
27. Why would fire be a good trigger for germination?
28. What is the dominant life form of flowering plants or angiosperms?
29. Where are auxins produced and give 3 functions of auxins.
30. How do auxins work?
31. Where are cytokinins produced and give 3 functions.
32. How do the amounts of cytokinin and auxin in relation to each other affect the
plant’s growth?
33. Where are gibberellins produced and give 2 functions.
34. Where is ABA (abscisic acid) produced and give 3 functions.
35. What determines when a seed germinates?
36. Give 2 functions of ethylene.
37. What is tropism?
38. What is phototropism and how does it work?
39. What is gravitropism and why is it important to the plant?
40. What is thigmotropism and how does it work?