1 / 24

Plants (K. Plantae)

Plants (K. Plantae). Plant Basics. Multicellular eukaryotes Cell wall of cellulose Photosynthetic (photoautotrophic) Evolved from an organism similar to today’s green algae Need to survive 1. sunlight 2. water and minerals 3. gas exchange 4. movement of water & nutrients.

charissa-harmon
Download Presentation

Plants (K. Plantae)

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. Plants(K. Plantae)

  2. Plant Basics • Multicellular eukaryotes • Cell wall of cellulose • Photosynthetic (photoautotrophic) • Evolved from an organism similar to today’s green algae • Need to survive • 1. sunlight 2. water and minerals • 3. gas exchange 4. movement of water & nutrients

  3. Just how do plants move water and nutrients? • Diffusion (if there is not a long way to go) • Capillary action • Vascular tissue • Xylem (water up from the roots) • Tracheids • Phloem (carbs down from the leaves)

  4. Plant Life Cycle

  5. The Nonvascular Plants • Low to the ground • no vascular tissue • gametophyte dominant • antheridia (female parts) and archegonia (male parts)

  6. The Nonvascular Plants • Division Bryophyta • Mosses • Moist habitats with poor soils • Rhizoids (root like)

  7. The Nonvascular Plants • Division Hepaticophyta/ Hepatophya • Liverworts • Reproduce via gemmae • Thallus (body)

  8. The Nonvascular Plants • Division Anthocerophyta • hornworts

  9. Seedless Vascular Plants • Require water for reproduction • Sporophyte dominant • No seeds (spores instead) • Vascular tissue

  10. Seedless Vascular Plants • Division Lycophyta • Club mosses (small plants in moist woodlands) • Many are epiphytes (grow on trees but don’t harm them)

  11. Seedless Vascular Plants • Division Arthrophyta • Equisetum (horsetail/ scoring rush)- abrasive silica in stems, found in marshes

  12. Seedless Vascular Plants • Division Pterophyta • Ferns • Spores found in sori on the underside of fronds

  13. Seed Plants- General Info • Do not require water for fertilization • Gametophyte dominant • Produce seeds • Adaptations for reproduction • Flowers/ cones to protect seeds • Pollination • Protection of embryos in seeds

  14. Seed Plants- Gymnosperms • “naked seed”

  15. Seed Plants- Gymnosperms • Division Cycadophyta (cycads like the sago palm and palm trees) • Mycorrizhae

  16. Seed Plants- Gymnosperms • Division Gingophyta • Gingko biloba – the only extant member of this division (“a living fossil”) • Male and female trees

  17. Seed Plants- Gymnosperms • Division Gnetophyta • Ephedra, Welwitschia

  18. Seed Plants- Gymnosperms • Division Coniferophyta (the conifers) • “cone-bearers” • Evergreens such as pines, firs

  19. Seed Plants- Angiosperms • Most diverse • Division Anthophyta (“flowering plants”) • More on flowers later…

  20. Seed Plants- Angiosperms • Monocots • Flower parts in 3’s • Examples: Lily, iris, grasses

  21. Seed Plants- Angiosperms • Dicots • Flower parts in 4’s or 5’s • Examples: rose, daisy, sunflower

  22. Plant Structures Stoma- found on leaf surface; used for gas exchange; opening controlled by guard cells; transpiration can also occur through stomata

  23. Plant Responses • Tropism- response due to an environmental stimulus; controlled primarily by hormones • Phototropism- light • Gravitropism/ geotropism- gravity • Thigmotropism- touch

  24. Plant Adaptations • Aquatic Plants • Mangrove trees • Desert Plants • Succulents • Thick coverings • Carnivorous Plants • Pitcher plants (shape, color, smell) • Venus fly trap • Parasitic Plants

More Related