1. Sexual Reproduction
Topic #2022A
Nick Wendling

2. Sexual Propagation Reproduction by seed
Most plants are started from seed
Normal for vegetables, flowers, grains, and forest trees

3. Advantages Economical Easier
Seeds can be stored for long periods of time
Less likely to transmit disease to offspring

4. Disadvantages Inconsistent in genetic makeup Slow to mature
Some plants do not produce viable seeds

5. Seed Production Seeds are produced in flowers
Flowers contain both sexual and sterile parts

6. Sterile Parts
Receptacle
Sepals
Petals

7. Sexual, or Fertile Parts
Male stamens, which make pollen
Female pistils, which contain egg bearing ovules

8. Stamen Filament – the supportive structure of the anther
Anther – where pollen is located

9. Pistils Stigma – collection area for pollen
Style – the tube that leads the pollen to the ovary
Ovary – the ovule bearing part of the plant

10. Pollination The transfer of pollen from the anther to the stigma
Once the pollen reached the stigma it stays there because of the sticky exudate.
The pollen grain then sends out a tube down the style all the way to the ovary within the ovule

11. Fertilization
A nucleus from the pollen tube unites with the egg nucleus in an ovule, making a zygote.
Each fertilized egg develops into a seed