6.2 Roots

• Biologie
• Middelbare school
• vwo
• Leerjaar 1

6.2 Roots

Aim:

• Students can identify the two different types of root systems that plants have

• Students can explain why plants have roots and can explain the importance of root hairs

• Students can explain the purpose, similarities and differences of xylem and phloem

• Students can compare and contrast xylem and phloem

Structures of a root

What do the roots do?

• The root cap senses where there is water.
• The primary and lateral roots anchor the plant in the ground and provide support.
• The root hairs absorb the water and nutrients from the soil.

Root hairs

Take up water en minerals

Larger surface area:

->more water uptake

->better grip on the soil 

-> more rigid in the ground

Inside a root

You only have to know this and the next slide:

xylem flows up. 

phloem flows down. 

You only have to know this:

xylem

transports

water up

phloem transports

water with glucose and

other substances made
by the plant

root

stem

flower

leaf

fruit

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

Which part of the root system is used for taking up water and minerals?

1. Roothairs
2. Lateral roots
3. Taproots

What needs to be transported in plants?

1. water
2. minerals
3. food products of photosynthesis
4. all are true

Transport in the xylem is

1. both ways
2. one way only (root to leave)

What does phloem transport?

1. glucose
2. water

Review: what have I learnt?

• Students can identify the two different types of root systems that plants have

• Students can explain why plants have roots and can explain the importance of root hairs

• Students can explain the purpose, similarities and differences of xylem and phloem

• Students can compare and contrast xylem and phloem

Make: 

The Root worksheet on classroom and hand it in on SOM before the lessen tomorrow