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!
1. What is structure A? How was it produced?
•zygote
•fertilization
2. Which structures represent cleavage?
B, C, D
3. What is structure E? blastula
4. What is structure F? gastrula
1.Identify all the structures that are
labeled.
G - ovary
H - oviduct
I - uterus
J – urinary bladder
K - vagina
1. Where does fertilization occur?
H - oviduct
2.Where does the embryo develop?
I - uterus
3.Where does the placenta develop? I - uterus
Stamen • Male reproductive
organ
• Anther: produces
pollen grains (male
gametes)
• Filament: stalklike structure
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
Petals • Attract pollinators:
–bright colored
–perfume
–nectar
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
Cross pollination or self pollination?
How does • Wind, insects,
pollination birds
occur?
What
happens
after
pollination
occurs?
http://www.youtube.com/watch?v=bwCpQflmQG4&feature=related
Pollen tube
Ovules
• 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
http://www.youtube.com/watch?v=KMQtLWpAdXI&feature=related
Seed Structure
Seed coat
1.Embryo:
- Epicotyl: will develop
into the upper
portion of the plant
- Hypocotyl: will
develop into roots
and lower portion of
the plant
Epicotyl
Hypocotyl
2.Cotyledon: food source
for plant embryo
Cotyledon
Let’s summarize…
1. 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.
1. The part of the pistil which contains
the pollen tube is the __________.
2. The transfer of pollen between the
anther and the stigma in any flowering
plant or plants is called _____.
3. ________ pollination occurs when
pollen is transferred between flowers
on different plants.
4. In order to reach an ovule, a ______
must grow through the style.
1. The sex cells in a flowering plant are located in
the
(1) 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.
(1) sepal (2) fruit (3) pollen tube (4) seed
3. The egg cell of a flowering plant develops in the
(1) pollen grain
(2) ovule
(3) Stigma
(4) fruit
1. The sperm of flowering plants is
contained in the ______ grain.
2. The entire female reproductive
organ in flowering plants is called
the _______.
3. The sticky top of the pistil is called
the _______.
4. The entire male reproductive organ
in flowering plants is called the
________.
pistil
stamen
7
3
anther 1
filament 2
4stigma
5
style
6
ovary
stamen
3
anther 1
filament 2
petal
8
4stigma
pistil
5
style
6
ovary
9 sepal
7