2. Plant Life Cycles

3. Meiosis Review Cell starts diploid –E–Ex: Human = 46 chromosomes Cell divides twice to create 4 cells End result: Haploid cells –E–Ex: Human = 23 chromosomes Cells created: Sperm, egg, pollen

4. Alternation of generations (In general) Diploid zygote created Diploid zygote grows into a diploid sporophyte Haploid spores created by meiosis Haploid spores grow into haploid gametophytes –M–Male gametophyte creates haploid sperm –F–Female gametophyte creates haploid egg Sperm and egg fuse to make a diploid zygote Cycle restarts

5. Moss Life Cycle

6. gametophyte 1)Moss gametophytes grow near the ground (haploid stage) 2) Through water, sperm from the male gametophyte will swim to the female gametophyte to create a diploid zygote 3) Diploid sporophyte will grow from zygote 4) Sporophyte will create and release haploid spores..... sporophyte egg male female zyg ote

7. 5) Haploid spores land and grow into new gametophytes..... groundgametophyte 6) The process repeats

8. ..... sporophyte egg male female zyg ote

9. 5) Haploid spores land and grow into new gametophytes..... groundgametophyte 6) The process repeats

10. Fern Life Cycle

11. Adult Sporophyte (diploid).... 1) Sporophyte creates and releases haploid spores ground

12. .... 2) Haploid spores land in the soil

13. ground 3) From the haploid spores, gametophyte grows in the soil Let’s zoom in

14. 4) Sperm swim through water from the male parts (antheridium) to the female parts (archegonia) Let’s zoom back out egg zyg ote

15. ground 5) Diploid sporophyte grows from the zygote sporophyte

16. 6) Fronds uncurls into leaves. ground 7) Cycle repeats -- Haploid spores created and released....

17. Adult Sporophyte (diploid).... 1) Sporophyte creates and releases haploid spores ground

18. .... 2) Haploid spores land in the soil

19. ground 3) From the haploid spores, gametophyte grows in the soil Let’s zoom in

20. 4) Sperm swim through water from the male parts (antheridium) to the female parts (archegonia) Let’s zoom back out egg zyg ote

21. ground 5) Diploid sporophyte grows from the zygote sporophyte

22. 6) Fronds uncurls into leaves. ground 7) Cycle repeats -- Haploid spores created and released....

23. Conifer Life Cycle

24. 1) Male and female seed cones grow in adult sporophytes

25. 2) Pollen grains released from the male seed cones -- Pollen is the male gametophyte egg zyg ote egg zyg ote Male cones make pollen Female cones make eggs

26. 3) Seeds begin to harden inside the female cones seed

27. 4) Seeds released

28. 5) Seed will land ground

29. 6) Seedling grows into (sporophyte)…the cycle repeats ground

30. 1) Male and female seed cones grow in adult sporophytes

31. egg zyg ote egg zyg ote Male cones make pollen Female cones make eggs

32. 3) Seeds begin to harden inside the female cones seed

33. 4) Seeds released

34. 5) Seed will land ground

35. 6) Seedling grows into (sporophyte)…the cycle repeats ground

36. Angiosperm Life Cycle

37. Pollen stick to animal or released into wind

38. Animal finds a new flower to feed on

39. Pollen transferred to the stigma….seeds develop egg zyg ote

40. Fruit ripens to help disperse seeds zyg ote

41. Fruit falls to ground

42. Animals eat fruit….seeds come out the other end…cycle repeats seed

43. Pollen stick to animal or released into wind

44. Animal finds a new flower to feed on

45. Pollen transferred to the stigma….seeds develop egg zyg ote

46. Fruit ripens to help disperse seeds zyg ote

47. Fruit falls to ground

48. Animals eat fruit….seeds come out the other end…cycle repeats seed

49. End of the Semester!