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> Unit 6 Flowers, fruits and seeds
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- Textbook Unit 6 Reproduction in plants and animals
- Notebook
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Slide 1:
Tekstslide
Biologie
Middelbare school
havo, vwo
Leerjaar 1
In deze les zitten
39 slides
, met
interactieve quizzen
,
tekstslides
en
2 videos
.
Lesduur is:
30 min
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Have ready
- Textbook Unit 6 Reproduction in plants and animals
- Notebook
Slide 1 - Tekstslide
Warming up...
Drag and drop the items to the correct place
Slide 2 - Tekstslide
root
stem
flower
leaf
fruit
Slide 3 - Sleepvraag
BS 1 and 2 Learning goals
You can name the parts of a flower and their functions
You can describe what pollination is
Slide 4 - Tekstslide
Flowers seeds and fruits
Flowers are the
reproductive
organs
of a plant
They contain both male and female sex organs
Many flowers have bright colors. Why would that be?
Slide 5 - Tekstslide
Slide 6 - Tekstslide
Use the figure in basic 6.1
Slide 7 - Tekstslide
anther
filament
petal
sepal
stigma
style
ovary
nectary
Slide 8 - Sleepvraag
Get to work
Make assignment 1, 3, 5b and c, 6 and 7
This is homework
Slide 9 - Tekstslide
Bs 2. Pollination
Pollination
: when pollen get on the stigma of a carpel
Slide 10 - Tekstslide
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 11 - Tekstslide
Cross-pollination
Self-pollination
Slide 12 - Tekstslide
Which number(s) indicate self-pollination?
Slide 13 - Tekstslide
Which numbers indicate self-pollination?
A
1
B
1 and 4
C
1 and 3
D
1,2,3
Slide 14 - Quizvraag
Insect pollination
Wind pollination
Slide 15 - Tekstslide
Insect and wind pollinated flowers
Slide 16 - 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 17 - Sleepvraag
The stamens in some plant species The stamen in some plants ripen earlier than the carpels.
What does this prevent?
Slide 18 - Open vraag
Not only insects pollinate flowers...
Slide 19 - Tekstslide
Let's make assignment 5 together
Go to unit 6.2 Pollination
Slide 20 - Tekstslide
Get to work
BS 1. Make assignment 1, 3, 5b and c, 6 and 7 (old homework)
BS 2. Make assignment 1, 2, 3, 6, 7
Slide 21 - Tekstslide
End of the lesson
Do your homework B1 and 2
Slide 22 - Tekstslide
Lessonstarter
You remember last lessons subject?
BS 2. try to make assignment
1, 3, 6, 7, 8 and 9
You have 10 minutes to complete them all!
timer
10:00
Slide 23 - Tekstslide
Have ready
- Textbook Unit 6 Reproduction in plants and animals
- LessonUp
- Notebook
Slide 24 - Tekstslide
What is the function of the calyx (sepals)?
A
attract insects
B
reproduction
C
protection against cold
D
producing nectar
Slide 25 - 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 26 - Quizvraag
What is self-pollination?
Slide 27 - Open vraag
From pollination to----> fertilization (in plants)
Slide 28 - 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 29 - 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 30 - Tekstslide
Slide 31 - Tekstslide
flower stalk
sepal
ovary
stamen
petal
ovule
Slide 32 - Sleepvraag
Slide 33 - Video
Slide 34 - 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 35 - Tekstslide
Which part becomes fruit pulp after fertilisation
A
ovary
B
sepals
C
carpel
D
ovule
Slide 36 - Quizvraag
How does a pollen grain nucleus reaches the ovule?
Slide 37 - Open vraag
In the video you saw an example of seed dispersal by
A
the wind
B
the plant itself
C
animals
Slide 38 - Quizvraag
Find a nice photo of seed dispersal by animals
Slide 39 - Open vraag
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