What are the parts
and function of a
flower?
Adrian Ang 5A-3
Group 3
Male Parts
•Anther- contains the pollen
- also called the
pollen head
•Filament- supports the
anther
- also called the
stalk
Female Parts
•Stigma- receives the pollen
from the anther
•Style- holds the stigma
- leads down the
ovary
•Ovary- contains the ovules
Sources
• www.google.com.images
• MyPals Are Here Science 5A
What is pollination and the agents of
pollination?
Sedrick Keh 5A-18
Group 3
Pollination
The transfer of pollen from
the anther to the stigma of
the flower
Pollen can come from the
same flower or a different
flower
Agents of pollination
Are the things that help in
pollinating the flower
Some examples are insects
like bees and butterflies,
birds and wind
The agents of
pollination are
attracted to the
flowers because of
their color or their
scent
Sources
 All pictures are from google
images
 Words from My Pals Are Here
Science 5A
How does pollination happen?
Sedrick Keh 5A-18
Group 3
• Pollination is the transfer of
pollen from the anther to the
stigma of a flower
• Two types of pollination:
1. Self - pollination
2. Cross – pollination
Process of Pollination
• The pollen is carried from the
anther to the stigma of the
same plant (self) or another
plant (cross) by the agents of
pollination
• This process is called
pollination
•After pollination
(when the pollen
grain lands on the
stigma) , fertilization
will take place
Sources
• Pictures are all from google
images
• Words from My Pals Are Here
Science 5A and Exploring and
Protecting Our World 4
BY: Francis Guevara 5A-17
► There
are two kinds of Fertilisation
► External
Fertilisation
► Internal
Fertilisation
► In
external fertilisation, The eggs are
fertilised outside the body of the female
► Female lays its eggs and male releases its
sperms on the eggs
► Frogs and fish are examples of animals
which fertilise eggs externally
► It reduces the survival rate of the
developing eggs
► Eggs
are Fertilised inside the body of the
female
► Increases the chances of successful sexual
reproduction
► Leopards and Human beings are Examples
of things that undergo internal fertilisation
► After
pollen lands on the stigma of a flower
fertilisation occurs
► Each pollen grain produces a tube called a
pollen tube
► The pollen tube grows down from the
stigma, through the style to the ovary
► The inside of the ovary contains ovules
inside each ovule is the egg cell
► The
pollen tube guides the male
reproductive cells from the pollen down to
the ovule.
► When the pollen tube reaches the ovule, a
male reproductive cell fuses with the egg
cell. This process is called fertilisation.
►waterwatchadelaide.net.au
►http://www.istockphoto.com/stock-photo-
368101-fertilized-egg-8-cell-stage.php
►My Pals are here! 5Ap.72,79
►noorclinic.com
►caribbeanedu.com
►theflowerexpert.com
PREPARED BY:
ADRIAN CHUA (Group 3)
Introduction


In reproduction, flowers play an important
role. They are the reproductive organs of
plants. Flowers develop into fruits. The fruits
protect and help to disperse the seeds.
Flowers help in reproduction of plants by
forming fruits. The male and female parts of
a flower contain male and female gametes
respectively that fuse to form seed. This
process takes place inside the ovary, which
matures to form fruit.
Pollination

Pollen must fertilize an ovule to
produce a viable seed. This process is
called pollination, and is often aided by
animals like bees, birds etc, which fly
from flower to flower collecting sweet
nectar and in the process, they transfer
pollen around, depositing it on some
stigmas on a subsequent flower. After a
male's pollen grains have landed on the
stigma, pollen tubes develop within the
style, burrowing down to the ovary,
where the sperm fertilizes an egg cell in
Fertilization

When a pollen grain lands on a stigma it
becomes hydrated and soon germinate. It
produces a passage called a pollen tube.
At the tip of the pollen tube is a male cell.
Once the pollen tube reaches the ovary, it
pushes its way into the ovule. There, the
male cell fuses with the female egg cell.
This process is called fertilization.
 Upon fertilization, the seed is formed. The
fruit develops only after the seed is formed.
FRUITS AND SEEDS





After fertilization, the ovules develop into seeds.
The ovary will enlarge and eventually become a
fruit. So a fruit is a matured ovary holding the
seeds.
The fruit develops to protect the seeds and in
some cases to become attractive to animals that
will be agents of seed dispersal.
A fruit is a seed container derived from an ovary
and any tissues that surround it.
As such, fruits are products of flowers and
therefore only occur in flowering plants.
The function of fruit is two-fold:
 to protect the developing seed
 to aid in the dispersal of the seed
Summary

While the beauty of flowers may seem relatively
simple, the process of their creation is complex.
Though a combination of factors, flowers create
seeds and fruit that serve as the by product of
their reproduction
 In general, the mature ovary constitute the fruit
 Fruits are formed after the flower has been
pollinated and fertilized
 A fruit results from maturation of one or more
flowers
Sources
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From flower to Fruit – www.botany.hawaii.edu/faculty/web/fFlowerFruit
How do Flower make seeds and fruits/eHow.com –
www.ehow.com/facts
How Seeds are formed – www.healthguidance.org
Fruit – wikipedia,the free encyclopedia
Flowering Plant – wikipedia, the free encyclopedia
Seeds and Fruits – plantphy.info/plant-human/seedfruitlab.shtm
http://www.itmonline.org/jintu/oldmen.htm
http://www.hilalplaza.com/BlackSeed.html
http://www.tutorvista.com/topic/flower-plant-reproduction
http://picsdigger.com/keyword/seeds%20fruit/
THANK YOU
FOR
LISTENING!