1 / 11

Sexual Reproduction

Sexual Reproduction. Topic #2022A Nick Wendling. Sexual Propagation. Reproduction by seed Most plants are started from seed Normal for vegetables, flowers, grains, and forest trees. Advantages. Economical Easier Seeds can be stored for long periods of time

elam
Télécharger la présentation

Sexual Reproduction

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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

More Related