6.3 stems

• Biologie
• Middelbare school
• vwo
• Leerjaar 1

6.3 Stems

What is not the purpose of the roots ?

1. Storing Food
2. Getting nutrients
3. Stability
4. Photosynthesis

What kind of a root system would a plant have that lives underwater (waterlily's )

1. Long spread out to get more nutrients
2. Downwards to get water
3. Downwards and to the side for stability

6.3 Stems

    Aim: What is (the anatomy and) the function of stems?

A daffodil is an example of a woody plant

1. true
2. not true

How do herbaceous plants get their strength and stay upright?

1. from woody stems
2. from the sun
3. from the pressure of water
4. from the roots

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vascular bundles

xylem

transports

water up

phloem transports

water with glucose and

other substances made by the plant

Read page 156. What is the name of the structure in the stem that transports food and water?

1. the highway
2. the tube
3. the vascular bundle
4. the stem

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Why is this color change occurring?

1. vascular bundles transport water only
2. vascular bundles transport water and dissolved substances like dye

cambium

dividing cells

forms xylem on one side and phloem on the other

each year new xylem and phloem

young xylem = sapwood

when no longer transporting it form heartwood

What needs to be transported in plants?

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

What does phloem transport?

1. glucose
2. water

Xylem is impermeable. What does this mean?

1. it does not let water through
2. it does let water in/out

Where are the vascular bundels located in the roots?

1. in a ring towards the outside
2. in the center

Transport in the xylem is

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

annual rings

sapwood + heartwood form rings

a thick ring => good growing year

ring is made up of two parts => springwood/early wood (spring)  and summer wood/late wood (summer + autumn)

oldest wood rings are in the center, youngest wood is on the edges