U6 B3,4,7 1HVTTO

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

B3 Fertilization

• Take off your jacket
• Put your things on your desk

       Book, notebook, pencil case

• Bag on the floor
  
• Read pages 177-178

Lessongoals

• You can describe the fertilization process in seed plants
• You can describe the change in the ovule after fertilization.

Today

• Check homework
• Recap
• After pollination what's next? 
• seed dispersal
• Time for hw
  
• End

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 flower on the picture is a(n):

1. Windflower
2. Birdflower
3. Insectflower

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, 5, 8

www.bioplek.org

Fertilization

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

Egg cell

Egg cell nucleus

Pollen grain nucleus

Pollen tube

What happens after fertilization?

Fruits and seeds

• Some flowers only have 1 egg cell in each ovary.
  
• Other plants species have more than 1 egg cell in each ovary.
  
• The fertilized egg, becomes the embryo.
  
• De ovary grows to become a fruit.
  
• Fig. 1 page 183 + explanation in book.
  

Pod

Seed dispersal

• Increased chance of survival if seeds are
  scattered or dispersed as far as possible
  from the parent plant.
  
• Wind dispersal
  
• Animal dispersal (eaten and pooped
  out or clinging to fur)
  
• Water dispersal
  
• Self-dispersal
  

Ga aan de slag met:

• Read pgs. 177 - 178 + 183-185
• Do asgmts 1, 3 + 5 pgs. 178-182
• Do asgmts 2, 4 + 6 pgs. 185-187
• Do asgmts 2, 3 on pgs. 214-215

Klaar met het bovenstaande?

• Continue with 6.7
• Make a summary
• Study for the test
• Read a book

Zw= working with whispering

• Teacher is available for questions
• Working individually
• only whisper with the person next to you
• Stay at your desk

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

Tidy Duty

Today these people are on tidy duty

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