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Plant Evolution: Understanding the Origins and Adaptations of Land Plants

Explore the fascinating evolution of plants, from eukaryotic algae to complex vascular land plants. Discover the challenges plants faced on land and the unique adaptations that allowed them to thrive. Learn about the different plant groups and their reproductive strategies in this educational video resource.

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Plant Evolution: Understanding the Origins and Adaptations of Land Plants

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  1. PLANT EVOLUTION

  2. What is a Plant? • Eukaryotic • Multicellular • Autotrophic • Organized tissues and organs

  3. Note: cell wall (cellulose), chloroplasts

  4. http://www.5min.com/Video/Plants-Adaptations-1354343

  5. Where did land plants come from? • Algae • Seaweed What kingdom do they belong to? PROTIST

  6. What obstacles might exist on land that do not exist in water? Gravity Nutrients always available in water Reproduction is easy

  7. Desiccation

  8. Who are the simplest land plants?

  9. Where do bryophytes live? Why?

  10. No Vascular Tissue Not believed to be a direct descendent from algae

  11. Tracheophytes What is your trachea?

  12. Tracheophytes

  13. VASCULAR TISSUE: Xylem & phloem • ROOTS • STEMS • LEAVES

  14. DESSICATION Cuticle

  15. Stomate

  16. http://www.youtube.com/watch?v=QX4Gi9wkKsA

  17. Who were the first land plants?

  18. FERNS: Polypodiophyta • Oldest group of plants: 300 mya • Vascular • Seedless, reproduces using spores in the water

  19. GYMNOSPERMS: Cones • Non-flowering plants • Seeds: not develop within an enclosed structure

  20. ANGIOSPERM: Flowers • Flowering plants • Seeds: within an enclosed structure

  21. What is the function of a flower?

  22. FEMALE MALE

  23. OVARY SEED = fertilized egg

  24. Going hormonal?Plants have hormones too!

  25. Dicot vs. Monocot

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