1TTO u2: plants B3: stems

• Biologie
• Middelbare school
• vwo
• Leerjaar 1

Lesson plan 25-01

-Test pre-existing knowledge: lifecycle plants+roots

-Work on exercises basics 1 + 2

-Assignment: logbook of a germinating plant seed.

-Start basics 3: Stems

The correct order in the lifecycle of a plant is:

1. Seed-seedling- mature plant-flowers-fruit-seed.
2. Seedling-seed-mature plant-flowers-fruit-seed.
3. Seed-flower-fruit-seed-seedling-mature plant-seed.
4. Seedling-seed-flower-fruit-mature plant-seed.

Lifecycle plant

-Seed

-Seedling

-Mature plant

-Flower

-Fruit

Lifecycle plant

-Seed, pip, nut, bean

-Contains nutrients to germinate(ontkiemen) and grow first green parts.

-No chloroplasts yet.

-Need heat and water.

Lifecycle plant

Seedling:

-Just germinated from seed.

-Seed leaves shrivel(verschrompelen).

-Root, stem, first leaves.

-Becomes green with chloroplasts.

Lifecycle plant

Mature plant:

-Can produce flowers, fruits, nectar and pollen.

-Flowers are used by seed-bearing plants to reproduce.

An example of an organ of a plant is:

1. Chloroplast
2. Vacuole
3. Leaf
4. Cell wall

Organ(systems)

-Root system: all roots together

-Leaf system: All leaves together.

-Stems

-Flowers

Roots can:

1. Fix/anchor the plant in the soil.
2. Store food for after winter.
3. Absorb water and minerals.
4. All of the above.

Roots

-Functions:

-Absorb water with minerals

-Firmness in the soil.

-Store food (like sugar).

-Consist of: Tap root(hoofdwortel), lateral roots(zijwortels) and root hairs.

What organs do seed-bearing plants need to produce seeds?

Work

-Do exercises 1 and 6, of basics 1 + 2

Home work

-Unit 2, basics 1+2: exercises 1 + 6

-Try to find a seed: appel/komkommer/pompoen/paprika etc.

-Try to make it grow in a dish / egg carton with: water; heat and soil(or cotton/ kitchen paper/ sand)

-check the seed every day and write changes in a logbook.

B3: Stems

-Terminal bud (eindknop)

-Lateral bud (okselknop)

-Axil (bladoksel)

-Internodes(leden)

-Nodes(knopen)

B3: Stems

-Buds: 

-Every year a new part of stem(internode) grows from a bud.

-You can count internodes to learn the age of a stem.

B3: Stems

Woody and herbaceous plants:

-Woody plants make wood in the cell wall to stay firm.

-Herbaceous plants use water in vacuoles to stay firm.

B3: Stems

Trees:-Have annual rings (jaarringen).

-Annual rings have a light and a dark part.

Dark: made in spring (early wood)

Light: Made in summer (late wood)

B3: Stems

-Stems:

-Transport water and nutrients around the organs of a plants.

-Hold up leaves, flowers and fruit.

-Have vascular bundles  trough stems, roots and leaves.

What has happened here?