Bacteria

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

Welcome!

Today: 

Questions

Explanation about bacteria (page 208)

Making homework 

4 kingdoms

Are oak trees and firs (spar) the same species?

1. Yes
2. No

The reproductive organ of a fungus is called a...

Is a donkey and a horse the same species?

1. Yes
2. No

Bacteria are a...

1. Prokaryote
2. Eukaryote

What are we going to learn today?

We are going to learn:

How bacteria are build.

How bacteria can benefit us. 

How bacteria can be a problem for us. 

How are bacteria build?

- Cell membrane?

- Cell wall?

- Nucleus?

- Chloroplasts?

- Vacuole?

- Unicellular or multicellular?

Bacteria cell

Light microscope vs. EM

Bacteriën zijn daarnaast super klein, tientallen keer zo klein als een dierlijke cel, als je ze goed wilt zien moet je ze dus ook met een speciale microscoop bekijken. 

Electron microscope

Reproduction of bacteria

Bacteria reproduce by dividing. They can do this very rapidly. When the circumstances are right, it can happen every 20 minutes!

Benefits of bacteria

- Help producing medicine  (insulin)

- Help producing food (yoghurt and cheese)

- Digest plant-based food in our body 

- Break down waste in nature

Risks of bacteria

Bacteria can cause many diseases, such as:

- Lung infection

- Food poisoning 

- Lyme disease 

Get to work!

The homework for next lesson are the exercises of paragraph 3.6, including the summary and plusexercise.