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Introduction to Plant Reproduction

Introduction to Plant Reproduction. Chapter 9 – Lesson 1. Introduction To Plant Reproduction. Sexual Reproduction Asexual Reproduction These processes occur in seed plants , and seedless plants. Seed Plants. Seedless Plants. Types of Reproduction. Sexual Reproduction

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Introduction to Plant Reproduction

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  1. Introduction to Plant Reproduction Chapter 9 – Lesson 1

  2. Introduction To Plant Reproduction • Sexual Reproduction • Asexual Reproduction • These processes occur in seed plants, and seedless plants.

  3. Seed Plants Seedless Plants

  4. Types of Reproduction • Sexual Reproduction • Requires the production of sex cells – sperm and egg – in reproductive organs. • Offspring produced are genetically different from either parent organism. • In some plants, water and wind help bring the sperm to the egg. • For other plants, animals such as insects help bring the sperm and egg together.

  5. SexualReproduction (continued) • Reproductive Organs • Male reproductive organs produce sperm. • Female reproductive organs produce eggs. • If a plant has both organs it can reproduce by itself. • If organs are present on separate plants, sperm and egg must come together with the help of the elements.

  6. Types of Reproduction (continued) • Asexual Reproduction • Does not involve or require the production of sex cells. • One organism produces offspring that are genetically identical to it.

  7. Examples of Asexual Reproduction • Plants need to reproduce sexually in order to reproduce asexually… Plantlet on Leaf Strawberry Plant - Runner Liverwart - Gemmae

  8. Plant Life Cycle • Two stages • Plants have a two-stage life cycle. • The two stages are the gametophyte stage and the sporophyte stage.

  9. Plant Life Cycle (continued) • Gametophyte Stage • During the gametophyte stage, gametes are produced. • Gametes are sex cells (sperm and egg). • The cells in this stage are haploid (n).

  10. Gametophytes • Seed Plants • Seedless Plants

  11. Plant Life Cycle (continued) • Sporophyte Stage • During the sporophyte stage, spores are produced. • The sporophyte structures have diploid (2n) cells, but produces spores that are haploid (n).

  12. Sporophytes • Seed Plants In flowering plants, the sporophyte comprises the whole multicellular body except the pollen and embryo sac • Seedless Plants

  13. Plant Life Cycle Diagram

  14. Plant Earth Pollination and Seed Dispersal

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