cross

Unit 7 Flowers, fruits and seeds

Have ready
- Textbook Unit 7
- Workbook
- Notebook

1 / 33
volgende
Slide 1: Tekstslide
BiologieMiddelbare schoolhavo, vwoLeerjaar 1

In deze les zitten 33 slides, met interactieve quizzen, tekstslides en 2 videos.

time-iconLesduur is: 30 min

Onderdelen in deze les

Have ready
- Textbook Unit 7
- Workbook
- 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

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 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