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Name: ________________________________________________ Date: _______________ Period: ______ Double Fertilization Tutorial Directions: Answer the questions below by visiting the following website. http://bcs.whfreeman.com/thelifewire/content/chp39/3902001.html Introduction 1. What happens during sexual reproduction? _________________________________________________________________________________ 2. What does the triploid cell do for a growing embryo? ______________________________________ Click “Animation” Click “Step Through” Step Through 1 of 9 3. What delivers sperm cells? ___________________________________________________________ 4. Where are sperm cells produced? ______________________________________________________ 5. Name the female reproductive organ. ___________________________________________________ Click PLAY Step Through 2 of 9 6. Circle one: The megaspore is haploid / diploid. 7. How many final megaspores usually develop? ____________________________________________ Click PLAY Step Through 3 of 9 8. How many haploid nuclei are created as a result of mitosis? _________________________________ 9. Name this structure with the eight nuclei. ________________________________________________ Click PLAY 10. Name the opening to the embryo sac. ___________________________________________________ Step Through 4 of 9 11. Where does the egg cell develop? ______________________________________________________ 12. Where do the polar nuclei develop? ____________________________________________________ Click PLAY Step Through 5 of 9 13. Who two parts of the female ovule take place in double fertilization? a. _______________________________ b. _______________________________ 14. What needs to happen before fertilization can take place? _________________________________________________________________________________ Click PLAY Step Through 6 of 9 15. What does the pollen grain land upon? __________________________________________________ 16. What connect the pollen grain and the ovary? ____________________________________________ Click PLAY Step Through 7 of 9 17. What is created when the degenerative cell splits by mitosis? ________________________________ Click PLAY Step Through 8 of 9 18. What happens to the synergids? _______________________________________________________ 19. Circle one: A zygote will become haploid / diploid / triploid. Click PLAY Step Through 9 of 9 20. What happens to the 2nd sperm cell? ____________________________________________________ 21. Circle one: The endosperm is haploid / diploid / triploid. 22. What is the purpose of the endosperm? _________________________________________________ Click PLAY Conclusion 23. Define DOUBLE FERTLIZATION. _________________________________________________________________________________ 24. Name the only plants that perform this process. ___________________________________________ 25. Name 3 nutrients stored within the endosperm. ___________________________________________ 26. Name the leaves of an embryo. ________________________________________________________ 27. Which process do these perform to make food energy? _____________________________________ Quiz 28. Answer to quiz question #1 = _________________________________________________________ 29. Answer to quiz question #2 = _________________________________________________________ 30. Answer to quiz question #3 = _________________________________________________________
