Unit 6.4 + 6.7

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

Unit 6.4

Fruits and seeds

Planning

Recap previous basics 

Instruction BS6.4: fruits and seeds

Making assignments

Which picture shows pollination and which one fertilization?

Flower with both sexes

One sex per flower

cross-pollination

self-pollination

male part

female part

carpel

stamen

Which numbers indicate
self-pollination?

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

wind pollinated flower

insect pollinated flower

Ovary

Pollen grain

Stigma

Pollen tube

Nucleus o.a. pollen grain

Style

Ovule

Egg cell

Nucleus o.a. egg cell

Learning goal

You can describe the changes in the ovary after fertilization.

Ovule --> seed

Ovary --> Fruit pulp

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

Which mechanism for dispersal is used by the seed shown in the picture?

1. The plant itself
2. Animals
3. The wind

Put the events in the right order

1

2

3

4

5

6

7

8

ovary becomes fruit

egg cell becomes plant embryo

ovule becomes seed

pollination

pollen is taken to a flower

fertilization

pollen makes pollen tube

pollen is made