6.2 Roots

• Biologie
• Middelbare school
• vwo
• Leerjaar 1

6.2 Roots

root

stem

flower

leaf

fruit

Aim:

    What are roots and what functions do they have?
    Which types of root systems are there?

Structures of a root

What do the roots do?

• The root cap senses where                                                                 there is water.
• The primary and lateral                                                                             rootsanchor the plant in the                                                                      ground and provide support.

• The root hairs absorb the water and nutrients from the soil.

wild carrot is an example of a plant with:

1. a taproot system
2. fibrous root system

Leek is an example of a plant with:

1. a taproot system
2. a fibrous root system

grass is an example of a plant with:

1. a taproot system
2. a fibrous root system

all these plants
have a:

1. taproot system
2. fibrous root system

Why do plant roots have cells with roothairs? look it up on page 152

osmosis

the movement of water from one side to the other.

Water moves from the side

 with the most particles

 to the side with the

 least particles.

Particles = deeltjes

You can skip page 153!

do not learn!!

Review: what have I learnt?

Close your books and answer out loud (or talk to your peer/brother/sister):

    What are roots and what functions do they have?
    Which types of root systems are there?