1 / 22

The Evolution of Seed Plants

emele
Télécharger la présentation

The Evolution of Seed Plants

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. The Evolution of Seed Plants

    2. Ancestry of Seed Plants gymnosperms naked seed plants angiosperms flowering plants

    4. Reproductive Adaptations reduced gametophyte generation independent of water for reproduction all are heterosporous seeds for dispersal of offspring

    7. Seed product of fertilization between female and male gametophyte seed multicellular integument embryo packaged in protective coat

    8. Pollen male gametophyte microsporangia produce pollen utilize wind instead of water for dispersion

    9. Female Gametophyte contains 8 nuclei, one of which will become the zygote when fertilized retained in the megasporangium

    10. Gymnosperms naked seed lack ovaries for seed development Phylum Cycadophyta Phylum Ginkgophyta Phylum Gnetophyta Phylum Coniferophyta

    11. Phylum Cycadophyta resemble palms tropical and subtropical regions bear naked seeds on sporophylls

    12. Phylum Ginkgophyta deciduous, fan shaped leaves fruit sold for food seed sold for medicinal purposes

    13. Phylum Gnetophyta variety of habitats closely related to angiosperms herbal ecstasy

    14. Phylum Pinophyta produce seeds in cones evergreen trees, needle-like or scale-like leaves many economic uses

    16. Angiosperms flowering plants split into 2 groups: monocots eudicots

    17. Xylem conifers possess tracheids conduct water structural support as well angiosperms have vessel elements water transport fibers for structure

    18. Flowers reproduction 4 whorls of modified leaves: sepals petals stamens anther filament carpels stigma, style, and ovary

    19. Flowers and Reproduction complete vs. incomplete flowers perfect vs. imperfect flowers monoecious vs. dioecious

    20. Fruit functions in dispersal a mature ovary various shapes for dispersal

    21. Angiosperm Life Cycle all heterosporous microspores pollen megaspores female gametophyte

More Related