7-5 5.3 Plants feed

• Biologie
• Middelbare school
• vmbo lwoo, vwo
• Leerjaar 1

7-5 5.3 Plants feed

Photosynthesis

Photosynthesis

Sunlight

Carbondioxide

Glucose

Oxygen

Water

Photosynthesis

Glucose

carbondioxide

oxygen

Water

sunlight

Starch can be stored

Complete from 5.3 ass. 1-4b, 5-8, 10-16

root

stem

flower

leaf

fruit

anther

filament

petal

sepal

stigma

style

ovary

nectary

Which number(s) indicate self-pollination?

Which numbers indicate self-pollination?

1. 1
2. 1 and 4
3. 1 and 3
4. 1,2,3

Insect and wind pollinated flowers

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

What is the male sex organ of a plant? And the female sex organ?

1. female: carpel male: petal
2. female: petal male: sepal
3. female: stamen male: carpel
4. female: carpel male: stamen

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.

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

flower stalk

sepal

ovary

stamen

petal

ovule

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 

Which part becomes fruit pulp after fertilisation

1. ovary
2. sepals
3. carpel
4. ovule

Structure of flower

Even though there are many different flowers, most of them have the same parts.

• Stamen: male reproductive organ
• Pollen: male sex cells

• Carpel: female reproductive organ

(stigma, style, ovary)

• egg cell: female sex cell

Pollination: transferring pollen from stamen to stigma.

Pollen grains do then have to get onto the stigma of the flower of the same plant species!

Self-pollination:

•  Pollen from stamen to stigma of the same flower,
  
• Pollen from one flower onto the stigma of another flower on the same plant,

Cross-pollination:

•  Pollen can also get onto the stigmas of flowers of a different plant (of the same species).

Insect-pollinated flowers

• Large and colorful petals, 
• Nectar, 
• Small amount of pollen

Wind-pollinated flowers

• Flowers small and not colorful, 
• Produce large amount of pollen, 
• Anthers often hang out of flower, 
• Stigma's large and feathery.

Which numbers indicate
self-pollination?

1. 1
2. 1 and 4
3. 1 and 3
4. 1,2,3

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

flower stalk

sepal

ovary

stamen

petal

ovule

Learning goals 

bs 1 and 2

1. you must be able to name the parts of a flower and its features and functions.
2. you must be able to describe what pollination is. 
3. And you must be able to tell the difference between cross-pollination and self-pollination.
4. you must be able to list the features of insect-pollinated flowers and wind-pollinated flowers. 

Learning goals 

bs 1 and 2

1. you must be able to name the parts of a flower and its features and functions.
2. you must be able to describe what pollination is. 
3. And you must be able to tell the difference between cross-pollination and self-pollination.
4. you must be able to list the features of insect-pollinated flowers and wind-pollinated flowers. 

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

Learning goals 

bs 1 and 2

1. you must be able to name the parts of a flower and its features and functions.
2. you must be able to describe what pollination is. 
3. And you must be able to tell the difference between cross-pollination and self-pollination.
4. you must be able to list the features of insect-pollinated flowers and wind-pollinated flowers. 

Pollination

Self-pollination

Cross-pollination

No pollination

Number 1

Number 2

Number 3

Number 4

Learning goals 

bs 1 and 2

1. you must be able to name the parts of a flower and its features and functions.
2. you must be able to describe what pollination is. 
3. And you must be able to tell the difference between cross-pollination and self-pollination.
4. you must be able to list the features of insect-pollinated flowers and wind-pollinated flowers. 

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

Pollen sacs are outside the flower

Pollen sacs are inside the flower

Stigma is usually inside the flower

Stigma is usually outside the flower

Stigma are feathery (geveerde vorm)

pollen grains are rough and sticky

Pollen grains are smooth and light

Learning goals 

bs 3

5. You can describe the fertilization process in seed plants.

6. You can describe the change in the ovule after fertilization.

Growth of orange and banana

Fruits with seeds

What part of the flower becomes the fruit?

1. stigma
2. style
3. ovary
4. carpel

Put the words in the correct order, starting with pollination. 

pollination

growth

germination

fertilization

dispersal

Germination = 

Did you plant your potato's?

1. Yes, I did it!
2. No, I forgot.