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Unit 7 Flowers, fruits and seeds
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- Textbook Unit 7
- Workbook
- Notebook
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Slide 1:
Diapositive
Biologie
Middelbare school
havo, vwo
Leerjaar 1
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Éléments de cette leçon
Have ready
- Textbook Unit 7
- Workbook
- Notebook
Slide 1 - Diapositive
root
stem
flower
leaf
fruit
Slide 2 - Question de remorquage
Learning goals
You can name the parts of a flower and their functions
You can describe what pollination is
Slide 3 - Diapositive
Warming up...
Drag and drop the items to the correct place
Slide 4 - Diapositive
Flowers seeds and fruits
Flowers are the reproductive organs of a plant
They mainly contain both male and female sex organs
Slide 5 - Diapositive
Slide 6 - Diapositive
Use figure 4 page 107
Slide 7 - Diapositive
anther
filament
petal
sepal
stigma
style
ovary
nectary
Slide 8 - Question de remorquage
Pollination
Pollination: when pollen get on the stigma of a carpel
Self-pollination: pollen can get onto the stigma of the carpel of the same flower
Cross-pollination: pollen get onto the stigmas of a different plant
(of the same species)
Slide 9 - Diapositive
Which number(s) indicate self-pollination?
Slide 10 - Diapositive
Which numbers indicate self-pollination?
A
1
B
1 and 4
C
1 and 3
D
1,2,3
Slide 11 - Quiz
Insect and wind pollinated flowers
Slide 12 - Diapositive
Insect-pollinated flower
Wind-pollinated flower
bright coloured petals
flowers are scented and contain nectar
pollen grains rough and sticky
small flowers
produce many pollen
stamen and stigma inside the flower
stigma are feathery and outside the flower
Slide 13 - Question de remorquage
The stamens in some plant species The stamen in some plants ripen earlier than the carpels.
What does this prevent?
Slide 14 - Question ouverte
Not only insects pollinate flowers...
Slide 15 - Diapositive
End of the lesson
Do your homework B1 and 2
Slide 16 - Diapositive
Have ready
Text and workbook
Notebook
Slide 17 - Diapositive
Program
Homework done before 24th of June
Reports
Repetition
Explain: Fertilisation and seed dispersal
Major test Unit 7 24th of June via Classmarker
Slide 18 - Diapositive
What is the function of the calyx (sepals)?
A
attract insects
B
reproduction
C
protection against cold
D
producing nectar
Slide 19 - Quiz
What is the male sex organ of a plant? And the female sex organ?
A
female: carpel male: petal
B
female: petal male: sepal
C
female: stamen male: carpel
D
female: carpel male: stamen
Slide 20 - Quiz
What is self-pollination?
Slide 21 - Question ouverte
From pollination to----> fertilization (in plants)
Slide 22 - Diapositive
FERTILIZATION
THE POLLEN GRAIN LANDS ON THE STIGMA
THE POLLEN FORMS A TUBE AND THE NUCLEUS GOES DOWN THE STYLE
THE POLLEN NUCLEUS MELTS TOGETHER WITH THE EGG NUCLEUS IN THE OVULE TO FORM A SEED.
Slide 23 - Diapositive
After fertilisation
A germ/plant embryo develops from the fertilised egg cell
The ovule develops into seeds
The ovary grows into fruit containing more seeds
pod
Slide 24 - Diapositive
Slide 25 - Diapositive
flower stalk
sepal
ovary
stamen
petal
ovule
Slide 26 - Question de remorquage
Slide 27 - Vidéo
Slide 28 - Vidéo
Dispersal of fruits and seeds
Plants disperse the seeds themselves by ejecting the seeds over a distance
Seeds are dispersed by wind
Seeds are dispersed by animals and humans
Slide 29 - Diapositive
Which part becomes fruit pulp after fertilisation
A
ovary
B
sepals
C
carpel
D
ovule
Slide 30 - Quiz
How does a pollen grain nucleus reaches the ovule?
Slide 31 - Question ouverte
In the video you saw an example of seed dispersal by
A
the wind
B
the plant itself
C
animals
Slide 32 - Quiz
Find a nice photo of seed dispersal by animals
Slide 33 - Question ouverte
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