B4 Fruits and seeds

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

Basic 4

Fruits and seeds

Today

* Homework 13-16

* Revision B3

* B4 fruits and seeds

Ovary

Pollen grain

Stigma

Pollen tube

Nucleus o.a. pollen grain

Style

Ovule

Egg cell

Nucleus o.a. egg cell

Revision

B3 Fertilisation

Pollination is the transfer from….?

1. stigma to anther
2. style to stamen
3. ovule to filament
4. anther to stigma

The two mechanisms for pollination are?

1. Wind and water
2. Insect and wind
3. Insect and water
4. Wind and birds

Cross-pollination…

1. Increases variation
2. Decreases variation
3. Is only performed by insects
4. Is only performed by wind

Flowers are adapted for wind-pollination by…

1. Having bright petals and a scent
2. Having nectar
3. Having feathery stigmas
4. Having sticky pollen grains

B4 Fruits and seeds

You must be able to describe the changes that take

place in the ovary after fertilisation.

Do exercises

17 + 19 - 23