1. Flowers allow some plants (angiosperms) to reproduce w/out water
Plant Reproduction
Flowers allow some plants (angiosperms) to reproduce w/out water

2. Most flowers have 4 basic parts.
petals
pistil/
carpel
stamen
sepals

3. Some floral structures are nonessential; they are not required for reproduction.
petals
colorful, protect , attract pollinators
sepals
leaf-like structures; protect the flower bud

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

5. Stamens are made of 2 parts.
anther
produces pollen
filament
supports anther

6. Pistils ( ) are made of 3 parts.
stigma
Receives/catches pollen
style
connects stigma to ovary
ovary
produces egg(s)

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

8. When pollen lands on the stigma, this process is called pollination.
A pollen tube grows and the sperm migrate to the egg. The sperm fertilizes the egg.

9. Pollinators include insects, birds, and wind.

10. Flowers & Pollinators
Wind pollination - not very efficient; produce vast amounts of pollen;
ex. Oak trees
Animal-pollinated plants have traits, such as bright colors and sweet nectars.

11. The egg and sperm unite in a process called fertilization.
The egg and sperm become one new cell called a zygote.
The zygote begins to grow and develops into a seed.
zygote
zygote

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

13. Flower to Fruit

14. Different fruits
Fleshy fruits - apples, grapes, melons, tomatoes, squash, cucumbers
Dry fruits – peanuts, walnuts, wheat, barley, corn, rice

15. Examples of ripened ovaries.

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

17. Seed Dispersal By animals – Seeds contained in sweet, fleshy fruits.
Seeds are covered with tough, protective coatings

18. By wind & water
Seeds are typically lightweight

19. Seeds with wings

20. Seeds with spikes