Unit 6 basics 4 and 5 fruits and seeds (& dispersal)

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 1

Have ready

- Textbook Unit 7 (on page 107)

- Workbook

- Notebook

Planning 

• Repeat basics 3 
• Basics 4 and 7

Warming up...

Drag and drop the items to the correct place

Stigma 

Sepal  

Stamen

Ovary

Fertilisation

How does it happen?

Fertilisation

1. Pollen grain will land on the stigma

2. A pollen tube will form

(stuifmeelbuis)

3. Pollen + egg nucleus fuse

(samensmelten)

How does a pollen grain nucleus reaches the ovule?

Basics 4 Fruits and seeds

Basics 7 Dispersal of fruits and seeds

Learning goals:
- You must be able to describe the changes that takes place in 

the ovary after fertilisation.

- You must be able to tell how the fruits and seeds of a plant are 

dispersed (= verspreid). 

After fertilisation

• A germ/plant embryo develops from the fertilised egg cell  
• The ovule develops into a seed
• The ovary grows into fruit containing more seeds 
  

pod

flower stalk

sepal

ovary

stamen

petal

ovule

Which part becomes fruit pulp after fertilisation

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

Why do plants make seeds and  fruits?

Why do plants make seeds and  fruits?

• To reproduce (voortplanten) 

Some fruits and seeds are edible

How are the seeds dispersed (verspreid)?

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 

In the video you saw an example of seed dispersal by

1. the wind
2. the plant itself
3. animals

Find a photo of seed dispersal by animals

Homework Monday

Unit 7 basics 4 exercises 17, 19 en 20

Unit 7 basics 5 exercises 24 en 25 

Learning goals:
- You must be able to describe the changes that takes place in 

the ovary after fertilisation.

- You must be able to tell how the fruits and seeds of a plant are 

dispersed (= verspreid).