Transcript flower_parts_(p._20_IO)

Flowers
Their main job for the
plant is:
•Develop into seeds &
fruits = Sexual
reproduction
•Reproduce the plant.
3 stages of plant growth
• Stages of Growth
1. Juvenile—when plant first starts to grow
from a seed.
2. Reproductive—when plant produces
flowers, seeds and fruits (any plant with
flowers)
3. Dormant—when plant rests or grows
very little if any.
Flowers - Develop into seeds & fruit
1. Sepals -
Green parts that cover &
protect flower bud before
it opens and are at the
base of the flowers once
blooming
Sepals
2. Petals
Are really leaves that are modified
to attract insects for flower
pollination, the pretty part we
call flowers.
They are bright &
colorful to attract
birds & bees
3. Stamen - the male flower part
that includes 2 parts: Anther
1. Filament - short stalk
that holds up the anther
Filament
so the bees can get it
2. Anther - a sac-like structure
that contains pollen (the male
sex cells or gametes)
Anther + Filament = Stamen
Male
parts
anther
filament
See the
pollen???
4. Pistil - the female flower
part
A) Female parts: Pistil
B) Male parts: Stamen
1. Ovules - the eggs or female
sex cells that become seeds if
fertilized
2) Ovary: holds the ovules or
future seeds
If ovules are fertilized, the ovary
becomes a fruit or seed coat.
So when you eat a fruit, it is the
ovary of the flower!
Ovary
Pistil (continued)
3. Style – long tube that holds
up the stigma & connects it to
the ovary. Pollen travels
down this tube to get to the
ovules
Style
4. Stigma - sticky part on top
of style where insects leave
pollen
Stigma
Female
parts
stigma
style
ovary
Complete flower -
Has both male &
female parts
Incomplete flower Has only male or
female parts
All about the birds and bees…
•Pollination - the transfer of
pollen from the anther to
the stigma of the plant.