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

2. 1)origin from ancestors similar to charophytes…

3. Abies amabilis - Oregon Pinus edulis - New Mexico

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

5. Pinus aristata - Colorado Sequoia sempervirens - Calif.

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

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

8. Pollen Cones on a pine tree

10. Figure 30.10x1 Pine Sporangium with spores

11. Pine pollen in hand.

12. dispersed pollen Male gametophyte growing in nucellus early pollen

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

16. Integument Eggs Male gametophytes (Megasporangium)

18. Figure 30.10x3 Pine embryo

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

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

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

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

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

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

30. Reconstruction of the seed fern Medullosa.

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

32. Reconstructions of seed fern seeds

33. Origin of the Seed. I

34. Origin of the Seed. II