Flower Structure for Sexual Reproduction: A Detailed Exploration

1. Topic: Reproduction Aim: Describe the structure of a flower and how it uses sexual reproduction. Do Now: 1. Take out the Seeds ISN. 2. Sit next to your 6 o’clock partner to work on the do now. HW: Ditto – Embryonic Development

2. Identify the type of development observed in the diagram. • Identify the types of organisms that use this type of development. • Identify the source of nutrition for the embryo. • Identify what cushions and protects the embryo. External development Aquatic and terrestrial Yolk Amniotic fluid

3. Identify the structure that produces estrogen and progesterone. • Where does a zygote develop? • Where is the egg fertilized? • Where does the placenta form? • Identify the process when an egg is released from an ovary. • Identify the process that occurs in the ovaries. B - ovary D - uterus A - oviduct D - uterus Ovulation Meiosis

4. Identify the process occurring in the diagram below. Support your answer. http://www.youtube.com/watch?v=VPHFzHRyZ1k

7. Topic: Reproduction Aim: Describe the structure of a flower and how it uses sexual reproduction. Do Now: Take out your HW and the Seeds ISN HW: CL Sexual Reproduction due Monday< March 9th Reproduction Exam on Tuesday, March 10th

8. 1. How do non-flowering plants reproduce? • Grow from spores instead of seeds

9. 2. Identify the function of petals. • Brightly colored to attract insects to pick up pollen from the flower and carry it to the next flower (POLLINATION) How are flowers pollinated?

11. 3. Identify an example of how pollination occurs in plants without petals. • Some grasses have small, dull, off-white flowers. • Use wind to blow pollen grains to other plants

12. 4. Identify the structures that protect the flower when it is still a bud. • Sepals

13. 5. Describe the appearance of sepals. • Leaves that form a ring around petals • Usually green or brown

14. 6. Identify the male parts of a flower and the two parts its consists of. • Stamen • Anther and filament

16. 7. Identify the male reproductive structure that produces and contains pollen. • Anther • Pollen: male gamete

17. How many sperm nuclei are present in a pollen grain?

18. 8. Identify the male reproductive structure that holds up the anther. • Filament

19. 9. Identify the female part of the flower and the three parts it consists of. • Pistil • Stigma, style and ovary

20. 10. Identify the female reproductive structure that pollen grains stick to. • Stigma

21. 11. Identify the female reproductive structure that holds up the stigma • Style

22. 12. Identify the female reproductive structure that contains the ovules. • Ovary

23. 13. Identify what is found in the ovules. • Eggs

24. 14. Describe what pollination is. • When pollen sticks to the stigma.

26. 15. Describe what happens once pollination occurs. • Pollen tubes form down the style from pollen grains to allow pollen to travel down the style and into ovary

28. 16. Describe the 2 things that occur once fertilization occurs. • Ovules become seeds • Ovary turns into fruit

29. 17. Identify the flower structure that produces nectar. • Nectaries

30. 18. How do insects drinking the nectar help in pollination? • Insects have to reach deep down into flower to find nectar. • Pick up pollen and carry it to next flower.

31. 19. Identify the structure where parts of the flower are attached. • Receptacle

32. Cross pollination or self pollination?

34. Topic: Reproduction Aim: Describe the structure of a flower and how it uses sexual reproduction. Do Now: Take out the Seeds ISN and the Embryonic Development HW HW: Bring your textbooks to class tomorrow!!! CL Sexual Reproduction due Monday< March 9th Reproduction Exam on Tuesday, March 10th

35. 3 1 2 Cleavage Zygote Fertilization A B C 4 5 Blastula Gastrula

36. stigma H anther style G petal filament ovary F sepal E ovule • Identify the male reproductive structure and its parts. • Identify the female reproductive structure and its parts. • Where are gametes produced? By what process? • What happens during pollination? • Identify what assists in pollination. • How do the sperm nuclei get to the ovules? • What happens to the ovules and ovary once the eggs are fertilized?

37. Plant embryo • Food supply – cotyledon 1. Identify what is found inside the seed.

38. Surrounds and protects the embryo • Keeps the contents of the seed from drying out 2. Describe the function of the seed coat.

39. Provides nutrients for the embryo as it grows. 3. Describe the function of the cotyledon.

40. Spreading 4. Identify what dispersal in line 3 refers to.

41. Embryo stops growing while it is still small. • When it starts to grow again, it uses nutrients in the cotyledon. 5. Identify what enables a seed to last for long periods of time.

42. Early growth stage of plant embryo 6. Describe seed germination.

45. Water • Suitable temperature 7. Identify the 2 conditions needed for a seed to germinate.

46. Seed Structure Embryo

47. http://www.youtube.com/watch?v=bwCpQflmQG4&feature=related http://www.youtube.com/watch?v=KMQtLWpAdXI&feature=related

48. Let’s summarize… • Describe the male reproductive organ of the flower. 2. Describe the female reproductive organ of the flower. 3. Explain what occurs during pollination. 4. Explain what occurs after pollination. 5. Explain what happens to the flower once the eggs are fertilized. 6. Describe the structure of a seed.