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Plant Life Cycles PowerPoint Presentation
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Plant Life Cycles

Plant Life Cycles

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Plant Life Cycles

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Presentation Transcript

  1. Plant Life Cycles

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

  3. 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 • Male gametophyte creates haploid sperm • Female gametophyte creates haploid egg • Sperm and egg fuse to make a diploid zygote • Cycle restarts

  4. Moss Life Cycle

  5. 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 zygote zygote egg egg zygote egg zygote male male gametophyte female female female male female male

  6. 5) Haploid spores land and grow into new gametophytes 6) The process repeats . . . . . ground gametophyte

  7. . . . . . sporophyte egg zygote egg zygote egg zygote egg zygote male male gametophyte female female female male female male

  8. 5) Haploid spores land and grow into new gametophytes 6) The process repeats . . . . . ground gametophyte

  9. Fern Life Cycle

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

  11. 2) Haploid spores land in the soil . . . . ground

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

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

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

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

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

  17. 2) Haploid spores land in the soil . . . . ground

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

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

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

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

  22. Conifer Life Cycle

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

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

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

  26. 4) Seeds released

  27. 5) Seed will land ground

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

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

  30. Male cones make pollen Female cones make eggs egg zygote egg zygote egg zygote egg zygote

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

  32. 4) Seeds released

  33. 5) Seed will land ground

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

  35. Angiosperm Life Cycle

  36. Pollen stick to animal or released into wind

  37. Animal finds a new flower to feed on

  38. Pollen transferred to the stigma….seeds develop egg zygote

  39. Fruit ripens to help disperse seeds zygote

  40. Fruit falls to ground

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

  42. Pollen stick to animal or released into wind

  43. Animal finds a new flower to feed on

  44. Pollen transferred to the stigma….seeds develop egg zygote

  45. Fruit ripens to help disperse seeds zygote

  46. Fruit falls to ground

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

  48. End of the Semester!