Unit 6 repeat

Planning
- Repeat Unit 6
- Time left? Work on your food web

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Slide 1: Tekstslide
BiologieMiddelbare schoolvwoLeerjaar 1

In deze les zitten 34 slides, met interactieve quizzen, tekstslides en 1 video.

time-iconLesduur is: 15 min

Onderdelen in deze les

Planning
- Repeat Unit 6
- Time left? Work on your food web

Slide 1 - Tekstslide

How is your potato plant doing? Show me your picture.

Slide 2 - Open vraag

 Repeat 
Unit 6 Reproduction in plants and animals

BS 1, 2, 3, 4 + 7

Slide 3 - Tekstslide

Learning goals 
bs 1 and 2
  1. you must be able to name the parts of a flower and its features and functions.

  2. you must be able to describe what pollination is. 
  3. And you must be able to tell the difference between cross-pollination and self-pollination.
  4. you must be able to list the features of insect-pollinated flowers and wind-pollinated flowers. 

Slide 4 - Tekstslide

Slide 5 - Tekstslide

Flower parts with features and functions:  
kenmerken en functies   
Sepals (Calyx)
Petals (Corolla)
Stamen
Carpel
Male reproductive organ
Stigma, style and ovary
To attract insects
Produce egg cells  in ovum
Filaments and anther with pollen sacs
Produce pollen grains 
To protect the flower bud against cold and dehydration
Large and brightly colored, sometimes small and green
Usually green

Slide 6 - Sleepvraag

What are the female sex cells called?

Slide 7 - Open vraag

What are the male sex cells called?

Slide 8 - Open vraag

Flowers
Corolla = petals 
Often big and colorful.  
Why is this useful for the flower?

Calyx = sepals 
Usually green. 
Why is this color useful for the flower?

Slide 9 - Tekstslide

Photosynthesis
Green parts of a plant can do photosynthesis = make their own food out of sunlight, so they can grow! 

Slide 10 - Tekstslide

Learning goals 
bs 1 and 2
  1. you must be able to name the parts of a flower and its features and functions.

  2. you must be able to describe what pollination is. 
  3. And you must be able to tell the difference between cross-pollination and self-pollination.
  4. you must be able to list the features of insect-pollinated flowers and wind-pollinated flowers. 

Slide 11 - Tekstslide

Pollination - read carefully!
Self-pollination
Cross-pollination
No pollination
When pollen on the anther of a flower reaches the stigma of a flower on the same plant
When pollen from one plant reaches the stigma of a flower on another plant 
When pollen of one species (=soort) reaches the stigma of a flower of another species

Slide 12 - Sleepvraag

Self-pollination
Cross-pollination
No pollination
Number 1
Number 2
Number 3
Number 4
Number 5
Number 6
Number 7
Number 8

Slide 13 - Sleepvraag

Learning goals 
bs 1 and 2
  1. you must be able to name the parts of a flower and its features and functions.

  2. you must be able to describe what pollination is. 
  3. And you must be able to tell the difference between cross-pollination and self-pollination.
  4. you must be able to list the features of insect-pollinated flowers and wind-pollinated flowers. 

Slide 14 - Tekstslide

Learning goals 
bs 1 and 2
  1. you must be able to name the parts of a flower and its features and functions.

  2. you must be able to describe what pollination is. 
  3. And you must be able to tell the difference between cross-pollination and self-pollination.
  4. you must be able to list the features of insect-pollinated flowers and wind-pollinated flowers. 

Slide 15 - Tekstslide

Learning goals
basics 3, 4 and 7

- you must be able to list the features of insect-pollinated flowers and wind-pollinated flowers. 

- you must be able to describe the fertilisation process in seed plants. 
- you must be able to describe te changes that take place in the ovary after fertilisation. 

- you must be able to tell how the fruits and seeds of a plant are dispersed. 

Slide 16 - Tekstslide

A tulip breeder wants to cultivate a new variety (DNA) of tulip from two existing tulip varieties.

Will he use cross-pollination or self-pollination? Explain your answer.

Slide 17 - Open vraag

Learning goals
basics 3, 4 and 7

- you must be able to list the features of insect-pollinated flowers and wind-pollinated flowers. 

- you must be able to describe the fertilization process in seed plants. 
- you must be able to describe te changes that take place in the ovary after fertilization. 

- you must be able to tell how the fruits and seeds of a plant are dispersed. 

Slide 18 - Tekstslide

Insect-pollinated flowers
Wind-pollinated flowers
The petals are colored 
The petals are small and green
The flowers have nectar and are scented
The flowers don't have nectar
Pollen sacs are outside the flower
Pollen sacs are inside the flower
Stigma is usually inside the flower
Stigma is usually outside the flower
Stigma are feathery 
pollen grains are rough and sticky
Pollen grains are smooth and light

Slide 19 - Sleepvraag

The stigmas of this species of grass have a feathery shape.
What advantage (=voordeel) does this have for the plant?

Slide 20 - Open vraag

Learning goals
basics 3, 4 and 7

- you must be able to list the features of insect-pollinated flowers and wind-pollinated flowers. 

- you must be able to describe the fertilization process in seed plants. 
- you must be able to describe te changes that take place in the ovary after fertilization. 

- you must be able to tell how the fruits and seeds of a plant are dispersed. 

Slide 21 - Tekstslide

Fertilization
Fertilization is the moment that the nucleus of the pollen grain and the nucleus of the egg cell fuse (=versmelten)

Slide 22 - Tekstslide

An ovary of a certain flower contains six ovules. The egg cells of four of the ovules are fertilised; the egg cells of the other two remain unfertilised.

How many seeds will develop in this ovary? Explain your answer

Slide 23 - Open vraag

Slide 24 - Tekstslide

Tomato breeder

Hallo. My name is Ties and I work as a tomato breeder. We make use of breeding to try and improve the properties of the plants. Almost all the familiar crops that are grown were created by breeding. We look for wild plants with new characteristics. In 2012, a wild tomato plant was found that was not affected by whitefly. Whitefly is a species of insect that can do a great deal of damage in a greenhouse. A tomato variety that is not affected by whitefly will produce a better yield. I am crossing the wild tomato with tomato plants that we already cultivate in an effort to develop a variety that will produce nice tomatoes and is not affected by whitefly.

Slide 25 - Tekstslide

Ties does the pollination of the plants himself. He collects pollen from one of the two plants that he wants to cross. He then uses that pollen to pollinate flowers of the other plant. After pollination, he covers the carpels, marking the flowers that he has already done.

Why does Ties cover the carpels after pollination?

Slide 26 - Open vraag

Learning goals
basics 3, 4 and 7

- you must be able to list the features of insect-pollinated flowers and wind-pollinated flowers. 

- you must be able to describe the fertilization process in seed plants. 
- you must be able to describe te changes that take place in the ovary after fertilization. 

- you must be able to tell how the fruits and seeds of a plant are dispersed. 

Slide 27 - Tekstslide

Dispersal of fruits and seeds
  • Plants disperse the seeds themselves by ejecting the seeds over a distance 
  • Seeds are dispersed by wind
  • Seeds are dispersed by animals and humans 

Slide 28 - Tekstslide

Find a nice photo of seed dispersal by animals

Slide 29 - Open vraag

Slide 30 - Video

Which part becomes fruit pulp after fertilisation
A
ovary
B
sepals
C
carpel
D
ovule

Slide 31 - Quizvraag

Food chains and food webs
Food chain




Food web

Slide 32 - Tekstslide

Slide 33 - Tekstslide

Thursday's planning
1. Hand in your report on the schoolgarden (15-6-2022) 
and your potato logbook.
2. Ask questions
3. Make Test Yourself
4. Make D-toets 

Slide 34 - Tekstslide