B3 Fertilisation

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

B3 Fertilization

6.3.5 You can describe the fertilization process in seed plants.

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

Stigma

Style

Petal

Stamen

Sepal

Ovary

Insect-pollinated flowers

Wind-pollinated flowers

Colourful petals

small, green petals

Flowers contain nectar

no nectar

Stamen outside the flower

Stamen inside the flower

Stigma inside the flower

Stigma outside the flower

Stigma is feathershaped

Pollen is sticky

pollen is light and smooth

1 uai 8 : Pollination? 

Self-pollination or cross-pollination? 

Basic 3 : Fertilization

Pollination; an experiment

Result

Pollen tube

When a pollen grain lands on the stigma of a plant of the same species, a tube starts to grow from it: the pollen tube

Fertilization

The fusion of the nuclei of a male sex cell and a female sex cell is called fertilization. 

Fertilization produces an embryo. The nucleus of a plant embryo contains the chromosomes of both the male and female sex cells.

Every seed contains a plant embryo

Basic 3 : Fertilization

Read basic 3

Basic 3 : Fertilization

Do exercise 1 u.a.i. 3 + 5

First 10 minutes in silence