1. Flower The organ responsible for sexual reproduction in plants
Function-
produce gametes
pollination
fertilization
develop seeds
develop fruit

2. 4 Basic Whorls of a Flower
Calyx- Outermost Whorl
All of the sepals collectively
Corolla- 2nd Outermost Whorl
All of the petals collectively

3. 4 Basic Whorls of a Flower
Stamen- 3rd Outermost Whorl
Male structure of the flower
Pistil- Made of fused carpels- Innermost Whorl
Female structure of flower

4. Diagram 1- Flower Structure
1. Petals-
Colorful leaf-like parts, attract animals/insects, aids in pollination
2. Stamen-
Male structure

5. Diagram 1- Flower Structure
3. Pistil-
Female structure
4. Pedicel/Receptacle-
Stalk like part, supports the flower

6. Diagram 1- Flower Structure
5. Sepals-
Small leaves that surround and protect the flower bud
6. Stigma-
Sticky top to the pistil, collects the pollen during pollination

7. Diagram 1- Flower Structure
7. Style-
Long stalk like part that extends from ovary, supports the stigma
8. Ovule-
Located inside the ovaries, will develop into a seed after fertilization

8. Diagram 1- Flower Structure
9. Ovary-
Enlarged base of the pistil, will develop into fruit after fertilization
10. Filament-
Slender stalk that supports the anther of the stamen

9. Diagram 1- Flower Structure
11. Pollen-
Formed in the anther, contains 2 nuclei, 1 tube nucleus, 1 generative nucleus
12. Anther-
Knob like end of the stamen, forms the sperm nuclei and the pollen grains

10. Diagram 2- Pollination (p 617)
The transfer of pollen from the anther to the stigma of flowers
Usually aided by insects or wind

11. Diagram 2- 2 types Self pollination Cross pollination Same plant
Either the same flower or 2 flowers on the same plant
Or 2 genetically identical plants
Cross pollination
Two genetically different plants

12. Diagram 2- Pollination  Fertilization (p 617)
2 separate events
Pollination occurs on the stigma
Fertilization occurs in the ovule

13. Diagram 2- After Pollination (p 617)
Pollen grain releases tube & generative nucleus into pistil
#14. Tube nucleus develops pollen tube
#13. Two sperm nuclei- from mitosis of the generative nucleus
#15. Pollen tube develops through style to ovule
2 sperm nuclei travel through tube to ovule

14. Diagram 2- Fertilization (p 617)
Double fertilization in the ovule
One sperm nucleus fertilizes (#16) egg nucleus to form the zygote (fertilized egg), this becomes the embryonic plant of the seed

15. Diagram 2- Fertilization (p 617)
Second sperm nucleus unites with (#17) 2 polar bodies, forms triploid (3n) cell that develops into endosperm of the seed

16. Diagram 3- Gamete Formation- Male (p 615)
Occurs in anther
Sketch
Diploid 
Meiosis 
4 haploid cells 
Mitosis 
Pollen grain with 2 nuclei

17. Diagram 3- Gamete Formation- Female (p 615)
Occurs in ovule
Sketch
Diploid 
meiosis 
4 haploid cells(3 die) 
mitosis 
8 haploid cells (5 die) 
3 haploid cells

18. Seed (p 620) An embryonic plant with a food source
Grows into a new plant
Germination
Water, temp., oxygen
Plumule (shoot tip w/embryonic leaves)
Epicotyl (stem)
Hypocotyl
Radicle (root)
Cotyledon (food source)
Endosperm (food source)

19. Fruit (pp 618, 619) Surrounds seeds
Dispersal of seeds- spread seeds around
Wind
Water
Animals
Edible
Carrier