Unit 6 - BS2

• Biologie
• Middelbare school
• vwo
• Leerjaar 1

Today's planning

At the end of the lesson...

• ... you have repeated yesterday's lesson
• ... you can tell what pollination is
• ... you can describe and recognise the difference between self-pollination and cross-pollination
  

Flower parts with features and functions:  

kenmerken en functies   

Sepals

Petals

Stamen

Carpel

Male reproductive organ

Stigma, style and ovary

To attract insects

Produce egg cells (female sex cells) in ovum

Filaments and anther with pollen sacs

Produce pollen grains (male sex cells)

To protect the flower bud against cold and dehydration

Large and brightly coloured, sometimes small and green

Usually green

Stigma

Petal

Ovary

Sepal

Filament

Stalk

Carpel

Stamen

Anther

Top part of stalk

Practice

Go to SomToday

Open the document 'worksheet 2 - BS1'

Do the questions

Pollination

Cross-pollination

Self-pollination

Practice

• Go to SomToday
• Open the document 'worksheet 3 - BS2'
• Do the questions

Today's planning

At the end of the lesson...

• ... you will have repeated what self pollination and cross pollination is
• ... you will be able to tell what features belong to insect pollinated flower and wind pollinated flowers

Pollination

Self-pollination

Cross-pollination

No pollination

Number 1

Number 2

Number 3

Number 4

Insect-pollinated flowers

• The petals are coloured
• The flowers have nectar and are scented
• Stamen are inside the flower
• Stigma is usually inside the flower
• Pollen grains are rough and sticky

Wind-pollinated flowers

• The petals are small and green
• The flowers don't have nectar
• Stamen are outside the flower
• Stigma is usually outside the flower
• Stigma has the shape of a feather

Insect-pollinated flowers

Wind-pollinated flowers

The petals are coloured 

The petals are small and green

The flowers have nectar and are scented

The flowers don't have nectar

Stamen are outside the flower

Stamen are inside the flower

Stigma is usually inside the flower

Stigma is usually outside the flower

Stigma has the shape of a feather

Pollen grains are rough and sticky

Pollen grains are smooth and light

Practice

• Go to worksheet 3 - basic 2
• Do part B