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Unit 7 Flowers, fruits and seeds
Have ready
- Textbook Unit 7
- Workbook
- Notebook
1 / 33
volgende
Slide 1:
Tekstslide
Biologie
Middelbare school
havo, vwo
Leerjaar 1
In deze les zitten
33 slides
, met
interactieve quizzen
,
tekstslides
en
2 videos
.
Lesduur is:
30 min
Start les
Bewaar
Deel
Printen
Onderdelen in deze les
Have ready
- Textbook Unit 7
- Workbook
- Notebook
Slide 1 - Tekstslide
root
stem
flower
leaf
fruit
Slide 2 - Sleepvraag
Learning goals
You can name the parts of a flower and their functions
You can describe what pollination is
Slide 3 - Tekstslide
Warming up...
Drag and drop the items to the correct place
Slide 4 - Tekstslide
Flowers seeds and fruits
Flowers are the reproductive organs of a plant
They mainly contain both male and female sex organs
Slide 5 - Tekstslide
Slide 6 - Tekstslide
Use figure 4 page 107
Slide 7 - Tekstslide
anther
filament
petal
sepal
stigma
style
ovary
nectary
Slide 8 - Sleepvraag
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 - Tekstslide
Which number(s) indicate self-pollination?
Slide 10 - Tekstslide
Which numbers indicate self-pollination?
A
1
B
1 and 4
C
1 and 3
D
1,2,3
Slide 11 - Quizvraag
Insect and wind pollinated flowers
Slide 12 - Tekstslide
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 - Sleepvraag
The stamens in some plant species The stamen in some plants ripen earlier than the carpels.
What does this prevent?
Slide 14 - Open vraag
Not only insects pollinate flowers...
Slide 15 - Tekstslide
End of the lesson
Do your homework B1 and 2
Slide 16 - Tekstslide
Have ready
Text and workbook
Notebook
Slide 17 - Tekstslide
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 - Tekstslide
What is the function of the calyx (sepals)?
A
attract insects
B
reproduction
C
protection against cold
D
producing nectar
Slide 19 - Quizvraag
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 - Quizvraag
What is self-pollination?
Slide 21 - Open vraag
From pollination to----> fertilization (in plants)
Slide 22 - Tekstslide
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 - Tekstslide
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 - Tekstslide
Slide 25 - Tekstslide
flower stalk
sepal
ovary
stamen
petal
ovule
Slide 26 - Sleepvraag
Slide 27 - Video
Slide 28 - Video
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 - Tekstslide
Which part becomes fruit pulp after fertilisation
A
ovary
B
sepals
C
carpel
D
ovule
Slide 30 - Quizvraag
How does a pollen grain nucleus reaches the ovule?
Slide 31 - Open vraag
In the video you saw an example of seed dispersal by
A
the wind
B
the plant itself
C
animals
Slide 32 - Quizvraag
Find a nice photo of seed dispersal by animals
Slide 33 - Open vraag
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