1 / 13

Section 14.1 Plant Reproduction

Section 14.1 Plant Reproduction. Pages 582-583. Agenda. Recap chapter 13 (13.1-13.3) Continue with xylem and phloem transport: 13.4 / Plant reproduction :chapter 14 Homework : Read pages 582- 591 Pg 592, Qn 3-5, 7, 11. Introduction. Reproduce both sexually and asexually

lottie
Download Presentation

Section 14.1 Plant 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. Section 14.1 Plant Reproduction Pages 582-583

  2. Agenda • Recap chapter 13 (13.1-13.3) • Continue with xylem and phloem transport: 13.4 / Plant reproduction :chapter 14 • Homework : Read pages 582- 591 Pg 592, Qn3-5, 7, 11

  3. Introduction • Reproduce both sexually and asexually • Reproduce sexually by sporic reproduction (alternation of generations) • Both a haploid (1n) gametophyte & a diploid (2n) sporophyte are stages in the reproductive cycle • Gametophyte produces gametes(1n) while sporophyte (2n) produces spores(1n) • Male + female = sporophyte (1n+1n =2n)

  4. Plant life cycle – Alternation of Generations

  5. Sexual Reproduction in Seedless Plants • Includes nonvascular mosses & vascular ferns • Fertilization requires the sperm to swim from the male gametophyte to the egg which is the female gametophyte • Water must be present & the sperm must have a flagellum to enable it to move in the water • In non-vascular plants gametophyte is the dominant generation, thus the plant is long lived and larger

  6. Seedless plants reproduction... • Smaller sporophyte depends on the gametophyte for food & support • In vascular plants, sporophyte is the dominant generation & the gametophyte is smaller & shorter-lived • E.g. Ferns, the large, leafy part is the sporophyte, while the gametophyte is small, barely visible structure • Both groups of seedless plants the gametophyte is free living independent of sporophyte

  7. Seedless Plants Reproduction

  8. Sexual Reproduction in Seed Plants • Include gymnosperms & angiosperms • Gametophytes are not free living plants • Male gametophytes called microspores, are small structures that develop into pollen grains  produce sperm cells • Female gametophyte called macrospores produce egg cells • In seed plants entire gametophyte travels to the female gametophyte

  9. Pollination • occurs when pollen (male gametophyte lands on female reproductive structure of another plant of the same species. • Pollen grain encases the cells that develop into the sperm & protects them from drying out as they travel to the female gametophyte

  10. Sexual Reproduction in Gymnosperms • The sperm is transferred to the egg through pollen tube • Sperm develops in the pollen tube & moves towards the egg

  11. Sexual Reproduction in Gymnosperms

  12. Adaptations! • Structure of pollen, the development of pollen tube allow & structure of seeds allow gymnosperms to reproduce in dry environment.

More Related