6.7 Melting together 1HVTTO

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

6.7 Melting together

Lessongoals

• Remember: I can describe the process of fertilisation in plants using the correct terms (pollen tube, ovule, egg cell).
  
• Understand: I can explain how fertilisation leads to seed and fruit formation.
  
• Apply: I can use examples like apples and peaches to explain differences in seed and fruit development.
  
• Analyse: I can analyse how fertilisation leads to variation in fruit structure by comparing different plant species.

Homework 6.7

Asgmt 59-64

Secret Student

This lesson, I have randomly picked someone to be the secret student.

I pay special attention to:

• Your use of English
• Your participation in the lesson

At the end I will reveal the secret student, If I can give them positive feedback, they also earn 1/3 +0,5 OR +1 cm² cheat sheet.

A carpel consists out of different parts.
Which of these is NOT one of them?

1. Ovary
2. Stem
3. Style
4. Stigma

The picture shows a magnolia tree.

What do you call it when a flower at spot A pollinates a flower at spot B?

1. Cross-pollination
2. Species-pollination
3. Self-pollination
4. Insect-pollination

The flowers in the picture are:

1. Windflowers
2. Birdflowers
3. Insectflowers
4. Humanflowers

Most flower make both male and female sex cells (cells used in reproduction).
What is the name of the female sex cell?
(2 words, singular)

Which numbers show cross-pollination?

1. Only 1
2. 1, 2, 3, 4
3. 1, 4, 7
4. 1 and 4

Which numbers show self-pollination?

1. 2, 5, 6
2. 2, 3, 8
3. 2, 5, 8
4. 1, 3, 6

make pollen

Pollen grains are made in the anther of the stamen.

These pollen grains can be made in the same flower, or come from a different flower

1

Pollination

Pollen grains land on the stigma of a flower of the same species.

2

make pollen

Pollen grains are made in the anther 

1

Pollination

Pollen grains land on the stigma of a flower of the same species.

2

Pollen grains make a pollen tube

Pollen grains start making a pollen tube, they 'dig' their way towards an ovule. inside the pollen tube, they bring their nucleus.

3

make pollen

Pollen grains are made in the pollen sac of an anther 

1

Pollination

Pollen grains land on the stigma of a flower of the same species.

2

Pollen grains make a pollen tube

Pollen grains start making a pollen tube, they 'dig' their way towards an ovule. inside the pollen tube, they bring their nucleus.

3

Fertilization

Once the nucleus of the pollen grain reaches the ovule it fuses with the egg cell inside. The DNA in both nuclei is combined.

4

After fertilization

The fertilized egg cell. Will change into a plant embryo.

The ovule will change into a seed

5

Fertilization

The moment when the nucleus of the pollen grain and nucleus of the egg cell become one.

1

Egg cell

Egg cell nucleus

Pollen grain nucleus

Pollen tube

Ovule

The egg cell is contained in an ovule.

The ovule consists out of many cells that will form the seed around the plant embryo

An ovule

After fertilization

The fertilized egg cell inside the ovule will change into a plant embryo.

The ovule will change into a seed.

The ovary will change into a fruit

2

This is the female reproductive cell of a plant

The nucleus of the egg cell contains half of the DNA of the plant.

This is the male reproductive cell of a plant

The nucleus of the pollen grain contains half of the DNA of the plant.

www.bioplek.org

What is correct order?

1. Making pollen > pollination > fertilization > making a seed
2. Making pollen > fertilization > pollination > making a seed
3. making a seed > pollination > fertilization > Making pollen
4. pollination > Making pollen > making a seed > fertilization

multiple pollen grains land on the stigma of a buttercup (pictured): 2 of a sunflower, 5 of a buttercup and 4 of a dandelion.
The ovary of the flower, contains 2 ovules.

What is the maximum amount of fertilizations that can happen in this flower? (number)

Flowers and their fruit take many shapes

1st choice: + OR Cheat sheet +1 cm2 OR Wheel

2nd and 3rd choice: Cheat sheet +1 cm2 OR Wheel

4th en 5th: Wheel 

TTO

What you should do: 6.7

• Pages  168-169 TB
• Asgmt  59-64 WB page 180 WB

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zs = Working in Silence

• No asking questions
• Silent, don't disturb anyone
  
• Stay at your  desk

What you should do: 6.7

• Pages 168-169 TB
• Asgmt 59-64 WB page 180 WB

Done with the above?

• Learn for the test 
• Make other homework
• Read a book

Zw = Working with whispering

• Teacher is available for questions
• Only whisper with the student next to you

The amount of ovules in an ovary can differ.
How can fruit help you discover the amount of ovules a flower had?

Secret Student

The secret student was .......

I paid special attention to:

• Your use of English
• Your participation in the lesson

If I can give them positive feedback, 

they also earn 1/3 +0,5 OR +1 cm² cheat sheet.

Tidy Duty

Today these people are on tidy duty

• Desks: empty and straight
• Chairs:  underneath the desks
• Floor: no rubbish