section 7 - plant reproduction

• Asexual reproduction


  Involves 1 gamete. Eg: runner and cutting.
• Sexual reproduction


  Involves 2 gametes (male=pollen, female=ova)
• Steps of sexual reproduction in plants

  1. Gamete formation

  2. Pollination (pollen to ova in ovary)

  3. Fertilisation: fusion of pollen and ova in ovary

  4. Seed and fruit formation. Seed (ova) and fruit (ovary)

  5. Seed dispersal: Wind, Animals, Water, Explosion

  6. Germination: seed grows into adult plant
• Cross-pollination


  2 plants
• Self-pollination


  1 plant
• Pollination agents


  Insect (bee) or wind
• Differences between asexual and sexual reproduction in plants


  • Sexual: 2 gametes, Slower, Genetically different offspring, Meiosis
  • Asexual: 1 gamete, Quicker, Genetically identical offspring, Mitosis
• Differences between insect and wind pollinated flowers


  • Insect pollinated: Large petals, Anthers inside petals, Stigma inside petals
  • Wind pollinated: Small petals, Anthers outside petals, Feathery stigma

  
• Germination experiment