2 Types of Seed Plants

1. 2 Types of Seed Plants • Angiosperms • Gymnosperms

2. Gymnosperms • Have cones for reproduction instead of flowers • 4 Types • Cycad • Ginkgo • Conifer • Gnetophyte

3. Gymnosperms • Cycads: look like ferns except they have seeds • Ginkgo: very large trees found mainly in China

4. Gymnosperms • Conifers: seeds are in cones or berrylike structures • Gnetophytes: shrubs and climbing vines

5. Angiosperms • Largest group of plant in the world • Found in all types of climates • Produce flowers for reproduction

6. Angiosperms • Parts of the flower: • Sepals • Petals • Stamen • Pistil

7. Sepals sepal • The sepals protect the flower before it opens.

8. Petals • The petals attract pollinating insects with their bright color and attractive scent.

9. Male Parts • The stamens are the male structures of the flower. • Made up of two parts: • Anther • Filament

10. Male Parts • Anther: top part of the stamen, that makes pollen. • Filament: this is the stalk of the Anther

11. Female Parts • Pistil is the female structure of flower that has 3 parts: • Stigma • Style • Ovary

12. Female Parts stigma • Stigma: • The pollen from another flower collects on the stigma’s sticky surface. • Style: • raises the stigma away from the Ovary

13. Female Parts • Ovary protects the ovules(egg). • Once fertilization has taken place it will become the fruit.

14. Write the correct words in the boxes:stamens, stigma, petals, ovary, sepals Write the correct words in the boxes:stamens, stigma, petals, ovary, sepals pollen sticks to this where the seeds grow 5 1 these attract insects where the pollen is made 2 4 These protect the flower before it opens 3

15. PLANT REPRODUCTION

16. Plants Reproductive Structures • Cones: Gymnosperms • Female cones contain the ovules which contains the egg cell • Male cones contain pollen which are like sperm cells • Flowers: Angiosperms • Pistil: female part of flower • Stamen: Male part of flower

17. Pollination • Insects visit flowers to search for nectar – their food. • But the flowers use the insects for their own purposes!

18. As the insect probes for nectar, its body rubs against the stamens. • Pollen gets stuck on the insect’s legs. • You can often see bees with a heavy load of yellow pollen on their hind legs.

19. Pollination When the insect visits another flower of the same type, the pollen will stick to the pistal. This is called pollination.

20. Fertilization The pollen travels to the ovary, where it joins with an ovule. This is called fertilization.

21. Seeds • Seeds: the fertilized egg • Seed Structure: consists of a seed coat, a young plant, and stored food

22. Types of Seeds

23. Types of Seeds

24. Seeds • The seeds develop inside the ovary, which grows to become the seed pod or fruit.

25. Seed Dispersal • The seeds are dispersed; some by animals, some by the wind, some by explosion and some by water.