Cette leçon contient 11 diapositives, avec diapositives de texte.
La durée de la leçon est: 60 min
Éléments de cette leçon
Welcome everyone!
Today:
Explanation about asexual reproduction (page 190)
Homework assignments
Slide 1 - Diapositive
What are we going to learn today?
Today we are going to learn:
-What the difference is between sexual and asexual reproduction.
-How certain organisms can reproduce asexually.
Slide 2 - Diapositive
Sexual reproduction
Sexual reproduction requires 2 sex cells, one male and one female. Because of the sex cells, there is always a difference between the parent and the child.
Slide 3 - Diapositive
Asexual reproduction
In asexual reproduction this works differently. You don't need sex cells, but normal cell division takes place. The DNA of parent and child is therefore the same. This often costs less effort/energy.
Slide 4 - Diapositive
Questions
You have 10 minutes to answer the following questions in pairs in your notebook, using your book:
1. What are tubers, bulbs and runners?
2. What kind of plants have tubers, bulbs or runners?
3. Why is this form of reproduction asexual?
timer
10:00
Slide 5 - Diapositive
Tubers
Slide 6 - Diapositive
Bulbs
Slide 7 - Diapositive
Runners
Slide 8 - Diapositive
Tissue cultivation
You can also cut plants, this is called tissue culture. Here you take a growing tip of a plant, cut it off and let it grow further.
Slide 9 - Diapositive
Other organisms
Other organisms can also reproduce asexually:
Fungi: Bud formation
Bacteria: Division
(Most) Animals can not reproduce asexually, a jellyfish can do something that comes close.
La durée de la leçon est: 60 min
