Unit 7 Flowers, fruits and seeds

Have ready
- Textbook Unit 7
- Workbook
- Notebook

1 / 33
suivant
Slide 1: Diapositive
BiologieMiddelbare schoolhavo, vwoLeerjaar 1

Cette leçon contient 33 diapositives, avec quiz interactifs, diapositives de texte et 2 vidéos.

time-iconLa durée de la leçon est: 30 min

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