1. Chapter 30: Plant Diversity
The Evolution of Seed Plants
30.1
Admit Slip
3. List 3 words you think of when you look at the picture/diagram
2. Write 2 ideas you have based on the picture and your words. If possible, use your words as you write your ideas.
1. Write 1 question you have.

2. Seeds and Pollen Grains are Key Adaptations for Life on Land
Seeds are plant embryos that have a food supply and are surrounded by a protective coat

3. 5 Crucial Seed Plant Adaptations
Reduced gamteophytes: microscopic, dependent on sporophyte for food and protection
Heterospory: production of 2 types of spores
Megaspores: female gametophytes-produce eggs
Microspores: male gametophytes-contain sperm
Ovules and the production of eggs: Increases protection of the egg and developing zygote

4. 5 Crucial Seed Plant Adaptations
Pollen and production of sperm: pollen grains have water-proof coating which eliminates the need for water transfer of sperm. Inside the pollen grain is a male gametophyte with 2 sperm nuclei.
Seeds: multicellular, safe-guarding of embryo, stored energy for embryo, can remain dormant while awaiting good germination conditions

5. Chapter 30: Plant Diversity
The Evolution of Seed Plants
30.2

7. Evolutionary trends in land plants
Reduction in gametophyte
bryophytes
pteridophytes
gymnosperm
angiosperm

8. Gymnosperms
“naked” seed, seeds not enclosed in ovaries, (usually on modified leaves that form cones)
No fruits

9. Gymnosperm life cycle

10. Pollination and Fertilization
Pollen lands on ovulate cone, drawn into micropyle
germinates; grows a pollen tube
Fertilization
Embryo develops
Cones open, seeds released
2009

11. Chapter 30: Plant Diversity
The Evolution of Seed Plants
30.3

12. Angiosperms Seed plants that produce flowers and fruit
90% of all plants are angiosperms

14. Angiosperms Flower structures:
Stamen: male reproductive structure-produces microspores that develop into pollen grains
Carpels: female reproductive struction-produces megaspores and products (female gametophyte and egg)

15. Figure 38.9 Growth of the pollen tube and double fertilization
2009

16. Angiosperm life cycle
2009

17. KEY FEATURES:
Double Fertilization
3n endosperm
2009

18. Mature ovaries of plant
Angiosperm Fruits
Mature ovaries of plant
After fertilization, the seed develops from ovules. The wall of the ovary thickens to become fruit.
Fruit helps to disperse seeds

19. 2009

20. SEED DISPERSAL

21. Angiosperm Classification
Monocot:
1 cotyledon in seed
Parallel leaf veination
Flowering parts in multiples of 3’s
Eudicot
2 cotyledon in seed
Net leaf veination
Flowering parts in multiples of 4’s and 5’s

22. Monocots vs. dicots
2009

23. 2009

24. Land Plant Evolution