U6 B5 Asexual reproduction

• Nieuwe lesbewerker
• Biologie
• Middelbare school
• vwo
• Leerjaar 1

Welcome everyone!

Today:

Explanation about asexual reproduction 

Homework assignments

Daltontask 

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.

In this case we eat the ...

A

Fruit

B

Seeds

C

-

D

-

What do we see in this image?

A

Dispersal of pollen

B

Dispersal of seeds

C

Fertilisation

D

A

Fruit

B

Seeds

C

-

D

-

For which of these fruits/vegetables are you (only) eating the seeds?

A

Strawberry

B

Bean

C

Banana

D

Pineapple

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.

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.

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?

10

m

00

s

+30 s

Tubers

Bulbs

Runners

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.

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.

Time to work!

read U6 B5 asexual reproduction

do U6 B5 exercise 1 to 3 + 5 to 8

or, 

DALTONTASK