1. Topic: Reproduction
Aim: Describe the structure of a flower and how it uses sexual reproduction.
Do Now: Practice Questions
HW: Castle Learning – Sexual Repro and Meiosis – due Friday!

2. zygote fertilization B, C, D blastula gastrula
What is structure A? How was it produced?
2. Which structures represent cleavage?
3. What is structure E?
4. What is structure F?
zygote
fertilization
B, C, D
blastula
gastrula

3. Identify all the structures that are labeled.
G - ovary
J – urinary bladder
H - oviduct
K - vagina
I - uterus

4. Where does fertilization occur?
Where does the embryo develop?
Where does the placenta develop?
H - oviduct
I - uterus
I - uterus

5. Stamen Male reproductive organ
Anther: produces pollen grains (male gametes)
Filament: stalk-like structure

7. Pistil Female reproductive organ Stigma: receives pollen (sticky)
Style: supports stigma
Ovary: contains ovules (contain eggs)
Once eggs are fertilized:
Ovary will develop into fruit
Ovules become seeds
Pistil

8. Petals
Attract pollinators:
bright colored
perfume
nectar

12. Pollination Transfer of pollen from anther to stigma
Cross pollination: pollen from one flower sticks to the sigma of a DIFFERENT flower
Self pollination: pollen sticks to the stigma of SAME flower

13. Cross pollination or self pollination?

14. How does pollination occur?
Wind, insects, birds

16. What happens after pollination occurs?

19. Pollen tube
Ovules

20. Pollen tube grows down style and into ovule
Pollen moves down pollen tube
Egg is fertilized  zygote  develops into embryo
Ovule develops into seed
Ovary develops into a fruit

21. Seed Structure Embryo:
- Epicotyl: will develop into the upper portion of the plant
- Hypocotyl: will develop into roots and lower portion of the plant
2.Cotyledon: food source for plant embryo
Seed Structure
Seed coat
Epicotyl
Hypocotyl
Cotyledon

22. Let’s summarize…
Describe the male reproductive organ of the flower.
2. Describe the female reproductive organ of the flower.
3. Explain what occurs during pollination.
4. Explain what occurs after pollination.
5. Explain what happens to the flower once the eggs are fertilized.
6. Describe the structure of a seed.

23. The part of the pistil which contains the pollen tube is the __________.
The transfer of pollen between the anther and the stigma in any flowering plant or plants is called _____.
________ pollination occurs when pollen is transferred between flowers on different plants.
In order to reach an ovule, a ______ must grow through the style.

24. The sex cells in a flowering plant are located in the
sepals and petals (2) stigma and nectar
(3) fruit and seed (4) stamens and pistil
2. In order to reach an ovule, a ___________ grows through the style and into the ovary.
sepal (2) fruit (3) pollen tube (4) seed
3. The egg cell of a flowering plant develops in the
pollen grain (2) ovule
(3) Stigma (4) fruit

25. The sperm of flowering plants is contained in the ______ grain.
The entire female reproductive organ in flowering plants is called the _______.
The sticky top of the pistil is called the _______.
The entire male reproductive organ in flowering plants is called the ________.

27. pistil
stamen 7 3 4
stigma 1
anther 2 5
style
filament 6
ovary

28. 3 4 1 2 5 7 6 9 8 stamen stigma anther pistil style filament ovary
sepal 8
petal