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Unit 6: Reproduction in plants & animals
Unit 6: Reproduction in plants & animals
§1 Flowers
1 / 57
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Slide 1:
Tekstslide
Biologie
Middelbare school
vwo
Leerjaar 1
In deze les zitten
57 slides
, met
interactieve quizzen
,
tekstslides
en
1 video
.
Lesduur is:
45 min
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Unit 6: Reproduction in plants & animals
§1 Flowers
Slide 1 - Tekstslide
Which flower species do you know
(Dutch names allowed)?
Slide 2 - Woordweb
Flowers have many different sizes & shapes
...but they share a similar layout
Slide 3 - Tekstslide
Slide 4 - Tekstslide
Slide 5 - Tekstslide
Slide 6 - Tekstslide
What are flowers?
Reproductive organs of plants
Generally 2 parts on the outside of a plant:
-
Callyx
(green,
consists of
sepals
)
-
Corolla
(coloured,
consists of
petals
)
Slide 7 - Tekstslide
Why are petals coloured?
Slide 8 - Open vraag
Slide 9 - Tekstslide
Paardenbloem
Slide 10 - Tekstslide
Madelief
Slide 11 - Tekstslide
Scherpe boterbloem
Slide 12 - Tekstslide
Zachte ooievaarsbek
Slide 13 - Tekstslide
Reigersbek
Slide 14 - Tekstslide
How do plants reproduce?
2 types of sex cells:
- Pollen grains (male)
- Egg cells (female)
Pollen are produced in the
stamens
Egg cells are produced in the
carpel
Slide 15 - Tekstslide
Stamen
Stamens & Carpel (Pistil)
Slide 16 - Tekstslide
Make §6.1
Assignment 1, 2, 3, 5
Slide 17 - Tekstslide
Unit 6: Reproduction of plants and animals
§2 Pollination
Slide 18 - Tekstslide
Stamen
Stamens & Carpel (Pistil)
Slide 19 - Tekstslide
Flowers
Produce
nectar
-->
sugary liquid
Pollinators
fly from flower to flower, taking pollen with them
Pollen are taken to the
stigma
of another flower -->
pollination
The other flower has to be the same species!
Slide 20 - Tekstslide
Hummingbird
Bat
Slide 21 - Tekstslide
Self- and cross-pollination
Slide 22 - Tekstslide
Wind pollination
Some flowers use wind to
disperse
pollen:
-
Coniferous trees
- Some
deciduous trees
- Grasses
No bright colours, mostly green/brown
Slide 23 - Tekstslide
Make §6.2
Assignment 1-3, 5-9
Slide 24 - Tekstslide
Unit 6: Reproduction of plants and animals
§3 Fertilization
Slide 25 - Tekstslide
Flowers
Produce
nectar
-->
sugary liquid
Pollinators
fly from flower to flower, taking pollen with them
Pollen are taken to the
stigma
of another flower -->
pollination
The other flower has to be the same species!
Slide 26 - Tekstslide
Where are pollen produced?
Slide 27 - Open vraag
Where are individual egg cells of a plant stored?
A
Ovary
B
Ovule
C
Stigma
D
Carpel
Slide 28 - Quizvraag
Stamen
Stamens & Carpel (Pistil)
Slide 29 - Tekstslide
So how does a plant get fertilized?
Slide 30 - Tekstslide
Pollen on the stigma
Fertilisation of the egg cell
Slide 31 - Tekstslide
Plant embryo
Embryo
starts growing after fertilization
Ovule
turns into
a seed
Slide 32 - Tekstslide
Make §6.3
Assignment 1-3, 5, 8
Slide 33 - Tekstslide
Unit 6: Reproduction of plants and animals
§4 Fruits and seeds
Slide 34 - Tekstslide
When a pollen grain reaches the carpel, a pollen tube grows through the ..., until it finally reaches the egg cell
A
Stigma, style, ovary
B
Style, stigma, ovary
C
Ovary, stigma, style
D
Stigma, ovary, style
Slide 35 - Quizvraag
What is the correct term for the fusion of two nuclei (e.g. a pollen nucleus and an egg cell nucleus)?
Slide 36 - Open vraag
Once an egg cell is fertilized, the ovule turns into ...
A
a plant
B
an embryo
C
pollen
D
a seed
Slide 37 - Quizvraag
What happens after fertilization?
Slide 38 - Tekstslide
Seed development
Only fertilized
ova
(egg cells) can develop
Ovules become
seeds
Ovary becomes the
fruit
Slide 39 - Tekstslide
Seed development
1. Flower before fertilization
2. After fertilization, ovules & ovary start to grow.
3. Petals and stamens fall off
4. Calyx (with sepals) shrinks, seeds become larger
5. Seeds/fruit grow and ripen
Slide 40 - Tekstslide
Fruits
Hundreds of different forms.
Some contain
pulp,
the edible part of a fruit
Slide 41 - Tekstslide
Figs
Grapes
Slide 42 - Tekstslide
Coconut
Jackfruit
Slide 43 - Tekstslide
Make §6.4
Assignment 1, 2, 4, 5, 7
Slide 44 - Tekstslide
Unit 6: Reproduction of plants and animals
§7 Dispersal of seeds
Slide 45 - Tekstslide
After fertilization, the ovary turns into a ...
Slide 46 - Open vraag
When a fruit is growing, the corolla ...
A
grows as well
B
falls apart
C
withers
Slide 47 - Quizvraag
Name the 3 parts of the carpel from top to bottom.
Write your answer like this.
..., ..., ...
Slide 48 - Open vraag
How do plants disperse their seeds?
Slide 49 - Tekstslide
Dispersal by the plant itself
(Cranesbill)
Schematic
Slide 50 - Tekstslide
Green beans
Ecballium elaterium
Squirting cucumber
Slide 51 - Tekstslide
Slide 52 - Video
Dispersal by the wind
Slide 53 - Tekstslide
Maple
Birch
Slide 54 - Tekstslide
Dispersal by animals
Slide 55 - Tekstslide
Slide 56 - Tekstslide
Make §6.7
Assignment 1, 2, 3
Slide 57 - Tekstslide
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