1. Flowers

2. The flower is the reproductive structure of higher plants.

3. Floral Structure

4. Most flowers have 4 basic parts.
petals
pistil
stamen
sepals

5. Some floral structures are nonessential; they are not required for reproduction.
petals
colorful, protect reproductive structures, attract pollinators
sepals
leaf-like structures which protect the flower before blooming

6. Some floral structures are essential for reproduction to occur.
stamens
male organs, produce sperm in pollen grains
pistil
female organ, produces egg(s)

7. Stamens ( ) are made of 2 parts.
anther
produces pollen
filament

8. Pistils ( ) are made of 3 parts.
stigma
style
ovary
produces egg(s)

9. Inside every pollen grain are two sperm cells.

10. Identify the structures in this flower.
petal
stigma
pistil
style
anther
stamen
filament
Where is the ovary?
Where are the sepals?

11. Reproduction

12. When pollen lands on the stigma, this process is called pollination.
A pollen tube grows from the pollen grain and the sperm migrate to the egg.
The first sperm fertilizes the egg.
The egg and sperm unite in a process called fertilization.

13. There are 2 types of pollination.
When pollen lands on a stigma of the same flower, this is self-pollination.

14. When pollen lands on a stigma of another flower, this is cross-pollination.

15. Agents of pollination include insects, birds, and wind.

16. The egg and sperm unite in a process called fertilization.
The two cells (egg and sperm) become one new cell called a zygote.
The zygote begins to grow and develops into a seed.
zygote

17. As the seed develops, the ovary grows into a fruit.
This means that anything you eat with a seed(s) is a ripened ovary.

18. Examples of ripened ovaries.

19. Which of these are fruits (ripened ovaries)?
Hint: If it has a seed, it’s a fruit.

20. Flower Adaptations

21. Some flowers have guide lines to help pollinators find their way inside.