6.10 Asexual reproduction 1HVTTO

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

6.10 Asexual reproduction

• Jacket in your locker
• Put your things on your desk

       Laptop/Book

       Notebook, pencil case

• Bag on the floor
  
• Read pages 174-176

Lessongoals

• Remember: I can list different types of asexual reproduction in plants (bulbs, corms, tubers, rhizomes, runners, cuttings, grafts, spores).
  
• Understand: I can explain how each type of asexual reproduction works and what advantages or disadvantages it has.
  
• Apply: I can use examples like strawberries and onions to describe how new plants grow without seeds.
  
• Analyse: I can analyse the difference between sexual and asexual reproduction in terms of genetic variation and survival.

Homework 6.10

Asgmt 77-87

Scan the chapter

Use your book and laptop/notebook

• Go to chapter 6.10 on pages 174-176
• Quickly scan the text for difficult/unknown words
• Make a list of all the words you don't know/understand, add these to your PIF
• Add descriptions and/or synonyms of these words during the lesson

How many sepals can you see on the right flower? (number)

How many styles can you see on the right flower? (number)

In the ovary of an apple blossom, there are 8 ovules.
During the blooming period of this plant,
6 pollen grains from apple blossoms, 5 from sunflowers, and 2 from a rose land on the flower's stigma.

How many seeds do you expect to find in the fruit eventually? (number)

In reality, an enormous number of pollen grains end up on the stigma of most flowers.
However, not all ovules always develop into seeds.
What could be a reason for this?

Sexual reproduction

Reproduction in which:

• a male and female sex cell fuse
• Involves fertilization

Examples:

• Reproduction in most animals
  
• Reproduction through flowers
  

Asexual reproduction Reproduction in which no fertilization/sex cells are required. 

A part of the (parent) organism becomes a new organism.

A sperm (male sex cell) and ovum/egg cell (female sex cell) fuse, this becomes the new 'child'

A pollen grain (male sex cell) and an egg cell (female sex cell) fuse, resulting in the formation of a plant embryo (baby plant).

Potatoes are thickened parts of the stem (tuber) of a potato plant. a potato plant makes several tubers below ground. These can all grow into new plants.

In bulbs or corms, smaller bulbs/corms develop. from these smaller bulbs/corms new plants can grow.

Bulbs are layered on the inside (onion)

Corms are similar but they don't have layers.

Bacteria reproduce by cell division. No fertilization is needed. 1 bacteria will 'copy' itself and become 2 bacteria.

Ginger is the rhizome of the ginger plant. These underground stems grow sideways. when part of the rhizome is separated it becomes a new plant.

Strawberry plants, make stems that move above ground (runners) these will at some point start forming new plants. If these runners are cut, two new plants have formed

00:56

What is the male sex cell for plants?

1. Pollen
2. Egg cell
3. Sperm
4. Stamen

01:32-01:42

Runners

Artificial reproduction

People propagate       plants:

• Cuttings = cutting a piece of stem from a plant and letting it develop into a new plant.
  
• Grafting = making a cut in the stem and inserting a different stem to combine the 2 plants.

Fruit trees are often grafted. 

Taking a stem that is strong and grafting the stems of a tree that has tasty fruit. 

In this way you combine the strengths of two tree species.

using asexual reproduction to turn 1 plant into multiple or to combine plants

These words I'll add to my PIF

What you should do: 6.10

• Pages 174-176 TB
  
• Asgmt 77-86 pgs 188-190 WB
• 86 use the internet to help you answer this question

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: 6.10

• Pages 174-176 TB
• Asgmt 77-86 pgs 188-190 WB
• 86 use the internet to help you answer this question

Done with the above?

• Work on the next chapter(s)
• 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
• Stay at your desk

Bob has an orchard (piece of land where fruit trees are grown). 1 of his trees has extremely tasty apples.
How could he make sure he gets more of these trees?

Tidy Duty

3 people each lesson

• Desks: empty and straight
• Chairs:  underneath the desks OR end of day: on the desks
• Floor: no rubbish