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The Evolution of Seed Plants Feb. 18 and 23, 2011

The Evolution of Seed Plants Feb. 18 and 23, 2011. life cycle of the pines origin of the seed Chapter 30. origin from ancestors similar to charophytes…. Abies amabilis - Oregon . Pinus edulis - New Mexico. Pinus elliottii - Georgia coast.

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The Evolution of Seed Plants Feb. 18 and 23, 2011

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  1. The Evolution of Seed Plants Feb. 18 and 23, 2011 • life cycle of the pines • origin of the seed • Chapter 30

  2. origin from ancestors similar to charophytes…

  3. Abies amabilis - Oregon Pinus edulis - New Mexico

  4. Pinus elliottii - Georgia coast Pinus ponderosa - Colorado mts.

  5. Pinus aristata - Colorado Sequoia sempervirens - Calif.

  6. Figure 30.9 The life cycle of a pine (Layer 3)

  7. pollen cones POLLEN AND SEED CONES OF A PINE Seed cones

  8. Pollen Cones on a pine tree

  9. Figure 30.10x1 Pine Sporangium with spores

  10. Pine pollen in hand.

  11. Male gametophyte growing in nucellus early pollen dispersed pollen

  12. The target of the pollen is the ovule -- near the axis of the seed cone.

  13. Integument Male gametophytes (Megasporangium) Eggs

  14. Figure 30.10x3 Pine embryo

  15. Figure 30.9 The life cycle of a pine (Layer 1) Integument

  16. Figure 30.9 The life cycle of a pine (Layer 2) Integument Integument

  17. Figure 30.9 The life cycle of a pine (Layer 3) Integument Integument

  18. The Evolution of Seed Plants • life cycle of the pines • origin of the seed

  19. COAL MEASURE SEQUENCE AT POINT ACONI, CAPE BRETON ISLAND. SHALE (MUD STONE) with scattered leaf fossils COAL SHALE with rootbearing Fossils in place

  20. Seed fern fossils provide cluews to the origin of the seed.

  21. Seed fern fossils provide cluews to the origin of the seed.

  22. Reconstruction of the seed fern Medullosa.

  23. a coal swamp, dominated by spore-dispersed plants

  24. Reconstructions of seed fern seeds

  25. Origin of the Seed. I

  26. Origin of the Seed. II

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