what are the parts and function of a flower? adrian ang 5a-3 group 3
TRANSCRIPT
What are the parts What are the parts and function of a and function of a
flower?flower?
Adrian Ang 5A-3Adrian Ang 5A-3
Group 3Group 3
Male PartsMale Parts•Anther- contains the pollen - also called the pollen head
•Filament- supports the anther
- also called the stalk
Female PartsFemale Parts•Stigma- receives the pollen from the anther
•Style- holds the stigma - leads down the ovary
•Ovary- contains the ovules
What is pollination What is pollination and the agents of and the agents of
pollination?pollination?
Sedrick Keh 5A-18Sedrick Keh 5A-18Group 3Group 3
PollinationPollinationThe transfer of pollen from The transfer of pollen from the anther to the stigma of the anther to the stigma of the flowerthe flower
Pollen can come from the Pollen can come from the same flower or a different same flower or a different flowerflower
Agents of pollinationAgents of pollination
Are the things that help in Are the things that help in pollinating the flowerpollinating the flower
Some examples are insects Some examples are insects like bees and butterflies, like bees and butterflies, birds and windbirds and wind
The agents of The agents of pollination are pollination are attracted to the attracted to the flowers because of flowers because of their color or their their color or their scentscent
SourcesSources All pictures are from google All pictures are from google
imagesimages Words from My Pals Are Here Words from My Pals Are Here
Science 5AScience 5A
How does How does pollination pollination happen?happen?
Sedrick Keh 5A-18Sedrick Keh 5A-18
Group 3Group 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 PollinationProcess 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
SourcesSources• 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-17BY: Francis Guevara 5A-17
► There are two kinds of FertilisationThere are two kinds of Fertilisation
► External FertilisationExternal Fertilisation
► Internal FertilisationInternal Fertilisation
► In external fertilisation, The eggs are In external fertilisation, The eggs are fertilised outside the body of the femalefertilised outside the body of the female
► Female lays its eggs and male releases Female lays its eggs and male releases its sperms on the eggs its sperms on the eggs
► Frogs and fish are examples of animals Frogs and fish are examples of animals which fertilise eggs externallywhich fertilise eggs externally
► It reduces the survival rate of the It reduces the survival rate of the developing eggsdeveloping eggs
► Eggs are Fertilised inside the body of Eggs are Fertilised inside the body of the femalethe female
► Increases the chances of successful Increases the chances of successful sexual reproduction sexual reproduction
► Leopards and Human beings are Leopards and Human beings are Examples of things that undergo Examples of things that undergo internal fertilisationinternal fertilisation
► After pollen lands on the stigma of a After pollen lands on the stigma of a flower fertilisation occursflower fertilisation occurs
► Each pollen grain produces a tube Each pollen grain produces a tube called a pollen tubecalled a pollen tube
► The pollen tube grows down from the The pollen tube grows down from the stigma, through the style to the ovarystigma, through the style to the ovary
► The inside of the ovary contains ovules The inside of the ovary contains ovules inside each ovule is the egg cell inside each ovule is the egg cell
► The pollen tube guides the male The pollen tube guides the male reproductive cells from the pollen reproductive cells from the pollen down to the ovule. down to the ovule.
► When the pollen tube reaches the When the pollen tube reaches the ovule, a male reproductive cell fuses ovule, a male reproductive cell fuses with the egg cell. This process is with the egg cell. This process is called fertilisation.called fertilisation.
►waterwatchadelaide.net.auwaterwatchadelaide.net.au►http://http://www.istockphoto.com/stock-photo-36www.istockphoto.com/stock-photo-368101-fertilized-egg-8-cell-stage.php8101-fertilized-egg-8-cell-stage.php►My Pals are here! 5Ap.72,79My Pals are here! 5Ap.72,79►noorclinic.comnoorclinic.com►caribbeanedu.comcaribbeanedu.com►theflowerexpert.comtheflowerexpert.com
PREPARED BY:PREPARED BY:ADRIAN CHUA (Group 3)ADRIAN CHUA (Group 3)
IntroductionIntroduction In reproduction, flowers play an important In reproduction, flowers play an important
role. They are the reproductive organs of role. They are the reproductive organs of plants. Flowers develop into fruits. The fruits plants. Flowers develop into fruits. The fruits protect and help to disperse the seeds.protect and help to disperse the seeds.
Flowers help in reproduction of plants by Flowers help in reproduction of plants by forming fruits. The male and female parts of forming fruits. The male and female parts of a flower contain male and female gametes a flower contain male and female gametes respectively that fuse to form seed. This respectively that fuse to form seed. This process takes place inside the ovary, which process takes place inside the ovary, which matures to form fruit.matures to form fruit.
PollinationPollination Pollen must fertilize an ovule to produce a Pollen must fertilize an ovule to produce a
viable seed. This process is called viable seed. This process is called pollinationpollination, and is often aided by animals , and is often aided by animals like bees, birds etc, which fly from flower to like bees, birds etc, which fly from flower to flower collecting sweet nectar and in the flower collecting sweet nectar and in the process, they transfer pollen around, process, they transfer pollen around, depositing it on some stigmas on a depositing it on some stigmas on a subsequent flower. After a male's pollen subsequent flower. After a male's pollen grains have landed on the stigma, pollen grains have landed on the stigma, pollen tubes develop within the style, burrowing tubes develop within the style, burrowing down to the ovary, where the sperm fertilizes down to the ovary, where the sperm fertilizes an egg cell in the ovule. After fertilization, an egg cell in the ovule. After fertilization, the ovule develops into a seed in the ovarythe ovule develops into a seed in the ovary..
FertilizationFertilization When a pollen grain lands on a stigma it When a pollen grain lands on a stigma it
becomes hydrated and soon germinate. It becomes hydrated and soon germinate. It produces a passage called a pollen tube. produces a passage called a pollen tube. At the tip of the pollen tube is a male cell. At the tip of the pollen tube is a male cell. Once the pollen tube reaches the ovary, it Once the pollen tube reaches the ovary, it pushes its way into the ovule. There, the pushes its way into the ovule. There, the male cell fuses with the female egg cell. male cell fuses with the female egg cell. This process is calledThis process is called fertilization fertilization..
Upon fertilization, the seed is formed. The Upon fertilization, the seed is formed. The fruit develops only after the seed is formed. fruit develops only after the seed is formed.
FRUITS AND SEEDSFRUITS AND SEEDS After fertilization, the ovules develop into seeds. The After fertilization, the ovules develop into seeds. The
ovary will enlarge and eventually become a fruit. So a ovary will enlarge and eventually become a fruit. So a fruit is a matured ovary holding the seeds.fruit is a matured ovary holding the seeds.
The fruit develops to protect the seeds and in some The fruit develops to protect the seeds and in some cases to become attractive to animals that will be agents cases to become attractive to animals that will be agents of seed dispersal.of seed dispersal.
A fruit is a seed container derived from an ovary and any A fruit is a seed container derived from an ovary and any tissues that surround it. tissues that surround it.
As such, fruits are products of flowers and therefore only As such, fruits are products of flowers and therefore only occur in flowering plants. occur in flowering plants.
The function of fruit is two-fold:The function of fruit is two-fold: to protect the developing seedto protect the developing seed to aid in the dispersal of the seedto aid in the dispersal of the seed
SummarySummary While the beauty of flowers may seem relatively While the beauty of flowers may seem relatively
simple, the process of their creation is complex. simple, the process of their creation is complex. Though a combination of factors, flowers create Though a combination of factors, flowers create seeds and fruit that serve as the by product of their seeds and fruit that serve as the by product of their reproductionreproduction
In general, the mature ovary constitute the fruitIn general, the mature ovary constitute the fruit Fruits are formed after the flower has been Fruits are formed after the flower has been
pollinated and fertilizedpollinated and fertilized A fruit results from maturation of one or more A fruit results from maturation of one or more
flowers flowers
SourcesSources From flower to Fruit – From flower to Fruit – www.botany.hawaii.edu/faculty/web/fFlowerFruitwww.botany.hawaii.edu/faculty/web/fFlowerFruit How do Flower make seeds and fruits/eHow.com – How do Flower make seeds and fruits/eHow.com – www.ehow.comwww.ehow.com/facts/facts How Seeds are formed – How Seeds are formed – www.healthguidance.orgwww.healthguidance.org Fruit – wikipedia,the free encyclopediaFruit – wikipedia,the free encyclopedia Flowering Plant – wikipedia, the free encyclopediaFlowering Plant – wikipedia, the free encyclopedia Seeds and Fruits – plantphy.info/plant-human/seedfruitlab.shtmSeeds and Fruits – plantphy.info/plant-human/seedfruitlab.shtm http://www.itmonline.org/jintu/oldmen.htmhttp://www.itmonline.org/jintu/oldmen.htm http://www.hilalplaza.com/BlackSeed.htmlhttp://www.hilalplaza.com/BlackSeed.html http://www.tutorvista.com/topic/flower-plant-reproductionhttp://www.tutorvista.com/topic/flower-plant-reproduction http://picsdigger.com/keyword/seeds%20fruit/http://picsdigger.com/keyword/seeds%20fruit/
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