1. Angiosperms

2. Group 3: Seed producing, Vascular Plants
Type 2: Angiosperms (flowering plants)
Flower = reproductive structure
Purpose: Attract animals
Forms fruit to protect and spread seeds
Seeds
Grow inside the fruit
Inside the seed
1. Embryo
2. Food supply

3. Seed Dispersal Fruit brightly colored Attracts animals
Seeds pass through animals digestive system
Seeds pooped in a new area to grow
Fruit seeds in fox poop

4. Angiosperm Groups 2 groups: Based on seed type
Cotyledon: embryonic leaf
Two Categories:
Monocots: embryo with 1 seed leaf
Dicots: embryo with 2 seed leaves

5. Monocots vs. Dicots
Key point
Key point

6. Apple Tree: Monocot or Dicot?2 1 3
Net-like veins 4 5

7. Monocot or Dicot? 2 1 3 4 6 5

8. Monocot or Dicot?
3 petals
Parallel veins

9. Monocot or Dicot?
5 petals

10. Monocot or Dicot?
Veins run parallel

11. Monocot or Dicot?
Veins run parallel

12. Monocot or Dicot?
Veins branch like net

13. Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec
Angiosperm Life Spans
Seed germinates
Flower  Fruit  Seeds
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec
Plant growth
Plant dies
Three Life Span Types:
1. Annuals
1 year: Seed grows…produce flowers & seeds…die

14. Angiosperm Life Spans Three Life Span Types: 2. Biennials
Seed germinates
Plant growth
Dormant
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec
Flower  Fruit  Seeds
Dormant
Plant growth
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec
Plant dies
Three Life Span Types:
2. Biennials
1st year: Seed grows and stores food
2nd year: grows more, makes flowers & seeds…dies

15. Angiosperm Life Spans Three Life Span Types: 3. Perennials
Seed germinates
Plant growth
Dormant
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec
Dormant
Plant growth
Dormant
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec
Flower, Fruit, Seeds
Dormant
Plant growth
Dormant
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec
Flower, Fruit, Seeds
Dormant
Plant growth
Dormant
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec
Flower, Fruit, Seeds
Dormant
Plant growth
Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec
Three Life Span Types:
3. Perennials
Live for more than 2 years
Plant dies

16. Flowers Reproductive structure of angiosperms Sepals
female
male
Reproductive structure of angiosperms
Sepals
outer ring of leaves
protection
Petals
Inner ring of leaves
Brightly colored to attract pollinators
Male and female organs found inside
petals
sepals

17. Flowers Female Carpel Male Stamen Inner most part
Ovary: within the base (female gametophyte)
Style: long stalk
Stigma: sticky tip, collects pollen
Male Stamen
Surround carpel
Filaments: long stalks
Anther: produces pollen (male gametophyte)
style
filament

18. Tulip Pistil and Stamen
female
male

19. Lily Pistil and Stamen
female
male

20. Pistil and Stamen
female
male

21. Pistil and Stamen
female
male

22. Self-Pollination (own pollen fertilizes own egg). . .

23. Cross-Pollination (pollen of one, fertilizes egg of another). . .

24. In the male anthers:
Meiosis creates 4 haploid microspores (gametophyte)
In each microspore, the nucleus splits in two
1 nucleus: forms pollen tube
1 nucleus: splits again to make 2 more nuclei
1 nucleus: fertilizes the egg
1 nucleus: fuses to make endosperm

25. Pollen grains released

26. In the ovule: Meiosis makes 4 megaspores (only 1 survives)
In megaspore, mitosis creates 8 nuclei
1 = egg cell
2 = forms embryo sac
5 = disintegrate
carpel
ovary
ovule

27. Pollination: Pollen land on the stigma.

28. 3 nuclei in Pollen: 1: forms pollen tube 2: transfer into the ovule .
Double Fertilization:
1 sperm nucleus fuses with egg nucleus (zygote created)
1 sperm nucleus fuses with 2 egg nuclei forming the embryo sac & endosperm
Reminder:
3 nuclei in ovule already:
1: forms egg
2: embryo sac

29. Ovule hardens into seed

30. Ovary grows into a fruit with the seeds inside… rest of flower dies

31. Fruit falls to ground

32. Fruit falls to ground

33. Fruit is digested… Seeds pass through…

34. Seedling begins to grow…

35. Years later….