cross

Repeating Unit 7, BS2 and 3

Repeating!
Unit 7 - BS2 and
1 / 21
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Slide 1: Tekstslide
BiologieMiddelbare schoolvwoLeerjaar 1

In deze les zitten 21 slides, met interactieve quizzen, tekstslides en 1 video.

time-iconLesduur is: 45 min

Onderdelen in deze les

Repeating!
Unit 7 - BS2 and

Slide 1 - Tekstslide

Basic 2: pollination
Pollination is the transfer of a pollen grain from the stamen of a flower to the stigma of a carpel in a flower of the same (type of) plant / plant species (=plantensoort)

Slide 2 - Tekstslide

Two types of pollination
1) Self-pollination
2) Cross polination

Slide 3 - Tekstslide

Self-pollination

Slide 4 - Tekstslide

Cross polination

Slide 5 - Tekstslide


What type of pollination is nr I?
A
Number I is self pollination
B
Number I is cross pollination
C
Number I is no pollination

Slide 6 - Quizvraag


What type of pollination is nr II?
A
Number II is self pollination
B
Number II is cross pollination
C
Number II is no pollination

Slide 7 - Quizvraag


What type of pollination is nr III?
A
Number III is self pollination
B
Number III is cross pollination
C
Number III is no pollination

Slide 8 - Quizvraag


What type of pollination is nr IV?
A
Number IV is self pollination
B
Number IV is cross pollination
C
Number IV is no pollination

Slide 9 - Quizvraag

Two ways of spreading pollen
1) Insect-pollination
2) Wind-pollination

Slide 10 - Tekstslide

Insect-pollinated flowers
  • Flowers are usually large.
  • The flowers smell.
  • Petals are usually brightly colored.
  • The stigma and the stamen are located in the flower.
  • The flowers usually produce nectar.
  • The flowers produce little pollen.
  • The pollen grains are large and sticky.

Slide 11 - Tekstslide

Wind-pollinated flowers
  • Flowers are usually small.
  • The flowers do not smell.
  • Petals are usually green.
  • The stamen and stigma are outside the flower.
  • The flowers usually do not produce nectar.
  • The flowers produce a lot of pollen.
  • The pollen grains are small and smooth.

Slide 12 - Tekstslide

Is a rose an insect-pollinated flower or a wind-pollinated flower? Explain your answer.

Slide 13 - Open vraag

Fertilisation
Fertilisation is the moment that the nucleus of the pollen grain and the nucleus of the egg cell fuse (=versmelten)

Slide 14 - Tekstslide

Fertilisation
Ovary becomes the fruit
Ovules become the seeds
Fertilised egg cell becomes the plant embryo

Slide 15 - Tekstslide

Slide 16 - Video

Can multiple (=meerdere) pollen grains pollinate and fertilise one flower? Explain your answer.

Slide 17 - Open vraag

Did pollination or fertilisation take place in the picture? Or both? Explain your answer.

Slide 18 - Open vraag

What part of the flower does the fruit's seed come from?
A
Ovary
B
Ovule
C
Carpel
D
Fertilised egg cell

Slide 19 - Quizvraag

What part of the flower does the fruit come from?
A
Ovary
B
Ovule
C
Carpel
D
Fertilised egg cell

Slide 20 - Quizvraag

The end!

Slide 21 - Tekstslide